Just for Girls

Why is it that video games are [thought of as] mostly being played by boys?
I was reading some older headlines on gaygamer.net and one of the posts was about a video on TED. Brenda Laurel discussed how she and her associates went on a mission to create a video game that would appeal to girls. Even though this video was only recently posted on TED, it was actually filmed back in 1998. I feel that her points are still very relevant today.
I had just finished reading an article by UCI's Professor Larry Cahill in Scientific American. In it, he discusses how many inclinations of young children (and perhaps these inclinations carry on into their adulthood), such as the tendency for boys to play with balls and for girls to play with dolls, are actually inborn and not based on cultural teachings. Could video games be one of those things that boys are just natural inclined to? Or is it just because game developers haven't been making the right kinds of games for girls? Sure, there have been a few titles, such as Barbie dress-up PC games etc. But these games are dull and short-lived in terms of how long it holds the attention of little girls.
I demo-ed Purple Moon before it came out, so I was a little girl too. Laurel and her associates meant well, and they were correct in seeing that there is a potential market in making games just for girls, but the games are still awfully boring to play.
-Gloria Law