Were Kinsey's studies debunked?

Question

To quote from a comment on my recent answer (emphasis mine):

Your quoting of Kinsey's bogus studies on homosexuality -- criticized heavily by famed statistician John Tukey -- makes me severely doubt the rest of your answer.

Leaving aside the point that validity of Kinsey's studies has very little logical effect on validity of the answer being commented on, it was the first time I heard something negative about Kinsey's studies (mostly since I never cared enough about them to bother checking into them).

Thus, a skeptical me asks:

Is there any subsequent study/report which would warrant labeling as "bogus"/"debunked" either specific major parts (especially, due to the impetus of the question, the parts related to sexual orientation), or the entire set of Kinsey's studies/reports (as far as methodology or any other criticism).

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P.S. For those who don't understand the context, Dr Alfred Kinsey was a mid-20th-century american researcher who studied human sexuality based on extensive questioning of people, and who published what was at some point considered the most important books on the subject ever written (sometimes referred to "Kinsey Reports") - "Sexual Behavior in the Human Male" and "Sexual Behavior in the Human Female".

Answer 1

In 1979, Paul Gebhard and Alan Johnson of the Kinsey Institute at Indiana University spent years "cleaning" the data of suspected contaminants (some of which are mentioned in dan04's answer). Their results were published in The Kinsey Data: Marginal Tabulations of the 1938-1963 Interviews Conducted by the Institute for Sex Research (1979), portions of which are available online via Google Books.

This excerpt lists some of the individuals excluded from the re-evaluation of Kinsey's data (the groups mentioned are the sample divided by college education and race):

All of these groups were cleaned in the sense of removing individuals who had derived from sources with known sexual bias. By known sexual bias we mean a group which we know to be substantially biased in some sexual way before we began interviewing its members. Examples include the Mattachine Society (a homosexual orginization), the occupants of homes for unwed mothers, prostitutes employed by a famous madam, personal friends of individuals known to be sexually deviant, and patients in mental hospitals. Also, all individuals who had been convicted of any offense other than a traffic violation were excluded since we now know that such individuals (as a group) differ in terms of sexual attitides and behavior from persons who have never been convicted.

However, the changes only led to a handful of differences. The authors attributed many to the improved statistical methods they were able to employ in the reevaluation, but some to the "cleaning" of Kinsey's data:

In another example, the effects of the cleaning of the sample were evident. The incidence figures of homosexual activity for single and married college-educated males, Table 90 in the Male volume, are quite similar to those of this volume, but our current noncollege sample has much lower incidences than Kinsey's grade-school and high-school-educated samples. A major cause of this discrepancy is clear; Kinsey's noncollege samples included persons who had been incarcerated in jails and prisons (where homosexual activity is relatively common) whereas our present sample excluded them.

Despite these differences, the authors maintained that no significant conclusions produced by the earlier Kinsey studies were debunked:

Despite the flaws of our earlier pioneering publications and the difficulties of comparing them with this volume, it is clear that the major findings of the earlier works regarding age, gender, marital status, and socioeconomic class remain intact. Adding to and cleaning our samples has markedly increased their value, but has not as yet caused us to recant any important assertion. In using our new Ns in analyses, we anticipate we will discover relationships previously unknown to us and we will undoubtedly have to modify some prior statements, but we feel the important contributions of Dr. Kinsey will stand.

As an example, the original Kinsey study indicated that 37% of males has had at least one homosexual experience to orgasm. The re-evaluation placed that figure at that 36.4%. The original study only found that 4% of the white male population to be completely homosexual (a 5 or 6 on the infamous Kinsey scale), while the re-evaluation placed that figure at 9.9% for the college-educated group and 12.7% for those with lesser education, astounding considering opponents expected that latter figure to be much smaller after omitting convicts.

Most resources criticizing Kinsey's work fail to take this re-evaluation into account at all, so it's hard to ascertain whether they missed anything or not. All of the flaws in Kinsey's original work seem to be accounted for. Furthermore, no study of this magnitude has been conducted since. Kinsey's study is by no means perfect, but neither has it been conclusively debunked.

Answer 2

From http://www.boxturtlebulletin.com/Articles/000,024.htm

But not all criticisms of Kinsey’s research were unwarranted. Writing for the Journal of the American Statistical Association in 1949, W. Allan Wallis noted several serious methodological deficiencies in Kinsey’s methods, which led to his findings not being statistically representative of the U.S. population.14 While it was largest survey of sexual behavior ever undertaken, it was hobbled by the fact that Kinsey didn’t trust probability sampling methods which were in their infancy in those days. (Remember, 1948 was also the year of the famous “Dewey Defeats Truman” headline.) According to Drs. Paul Gebhard and Allen Johnson of Kinsey’s Institute of Sex Research:

To Kinsey, the solution to sampling problems was to increase the size and diversity of the sample, and he felt that all biases and other problems would average out and nullify one another as the sample grew and proliferated. 15

...

One look at the demographics of Kinsey’s sample clearly showed its biases. Kinsey’s sample favored professionals and those under the age of 35. Geographically, Kinsey’s sample was heavily concentrated on the Northeast and Midwest, especially in the state of Indiana where the bulk of Kinsey’s surveys took place.17

Kinsey’s homosexual sample provides another illustration of the problems in Kinsey’s dataset. Because of the difficulty in finding homosexuals in the repressive atmosphere the time, Dr. Kinsey relied on interviews with members of homophile groups such as the Mattachine Society and homosexual communities in a few large cities. He also interviewed prisoners and institutional populations...