Personally - and in contradiction to the link you posted - I'm assuming that people are either not going to report in or are going to tell the truth and that the chances of lying/not reporting in are about the same across genders.
With lying being very very low.
I started this poll because of this http://news.ycombinator.com/item?id=749514 link posted (and dead within seconds) by a user that identified herself as a female by her name in the forum nickname.
It made me wonder how many of the anonymous nicknames belonged to females because for the most part all the names that I can relate to a gender on the forum with the exception of DaniFong belong to males.