It's really hard to say. There have been a couple questions that have had more female opinions than any male opinions in any questions. I think just the same number of guys go around answering everything. But I think there are more girls since they usually have more votes in polls. At least from what I've noticed.
im surprised this actually gets asked a lot. maybe GaG should implement a live counter feature showing currently active online members of both genders at the top of the screen, and maybe a total, or active/total.