Which is not to say that many women wouldn't enjoy that kind of high-octane environment! Hey, different strokes etc. All I know is that for me personally — someone who goes online to have fun, not to be right — it's a lot more pleasant to hang out in mixed-gender communities than in male-dominated ones.
(Then again, here I am on HN, slingin' ideas again, sooo...)
(Also, I have to apologize for responding to a question directed towards women in the most stereotypical "as a dude" kind of way. To be honest, I should have probably held off...)