For a serious response, here's mine chopped up, I did not want to ramble on to create constructive sentences.
First off, forums are no different than gatherings that are created for people to speak their mind on. There are no doubt women and men out there blabbering on Harley sites, women (and men) on Oprah/Tyra/Jerry's forums or whatever is out there. We have a mix of both sexes on either sites. But on an intimate/personal level, we can notice disparities such as how there is a minor female presence here.
A good amount of women tend to associate their interests in personality issues, some materialism, "marriage keeping", - am I on track?
Men tend to side with hobbies and personal material interests; gadgets, phones, cars, electronics.
This does not represent everyone, it is representation by stereotypical norms.
If you had noticed, ever doing a quick headcount on talk shows, usually it appears that most of the audience are women. And these assertions are correct when doing numbers statistically, you should notice that there are more women in the audience. This is what I am trying to enforce my perspective on the interests women tend to follow.
Women in relationships seem to focus telling their guys to give up their stuff to focus on something else in the relationship. My proof of this stems from all the posts that come up in OT/LR, FS/FT "Wife had a baby, this needs to go".
Anandtech is predominantly an IT based site, no questions asked. Some of us have seen women in the IT force, I had a daily coworker in mine back when I worked corporate IT. But I noticed that 1 out of perhaps 20 people were women with careers in the IT workforce.
Perhaps there just isn't as much interest in IT and Computer science as much as there is for males. Surely it's growing as the population size is growing, however for a 1:1 ratio, you, I, anyone else can tell that there is still some time until then.
Finally, all I previously said only considers the population. What it doesn't consider are the people willing to post. Believe me, there's a larger lurking population (be it from guests, or non posting members) than there is for the posting population. There may be cultural, racial, gender or sex differences for why some do not post.
When you take all of this in and try to plug some numbers - I am VERY certain it will show a lower percentile with posting women members on IT sites compared to men.