Exactly. I seriously don't understand why some girls don't GET that. I mean, seriously, have they ever set foot in a game store? I know I always become extremely aware of my gender when I do. The testosterone levels can be a little overwhelming at times.
It's not a sexist thing, it's just about MONEY. The companies aren't stupid -- they do market research all the time. If at any time, they started to see a noticeable change in the trend, they would start marketing toward female gamers more. But the mere fact that it's not changing indicates that, while there may or may not be more female gamers, it's still not enough of a change to make decent money off it.
A few years ago, car companies started noticing that women had more and more to say in the decision to buy a family car. So they started building more minivans with airbags and all that safety stuff, and they changed their advertising so that it's aimed more toward women. That is because they did their market research and saw a change. Like I said, it's all about making money. And until game designers start noticing such a change in their market, things will remain the same.
I don't know, I'm probably just rehashing what GoA has already said... but that's just because it's true.
Maybe it's just easier for me to understand because I work in a male-dominated industry. *shrugs* It doesn't always have to be about sexism.