I think women on the internet visiting forums plays on the figures as well. I normally find on a forum the number of male members is larger than female, so I think it's hard to tell, though I know typically religiosity is higher in women, but I think it can be a societal thing. But I know many women who are non-religious, though the majority of my religious friends are women.
I wouldn't say it reflects anything societal. I don't think the forum can offer a fair enough depiction for that, but we do see a variety, we've got/had atheists here who are conservative, liberal, English (and Europe in general), American, Aussie, gay, straight, bi, black, white, hispanic, of an urban background, of a rural background (like me), wealthy, poor, moderate, Buddhism, Nihilist, Humanist, conspiracy theorist, gun nut, gun hater, gun-right supporter, male, female (not sure if we've had anybody transgendered) and we've even had amputees and there's problem more I've missed or have not been aware of. I can say at least this forum gets plenty of diversity amongst its atheists.