I'm not a "girl gamer." That makes sense since I am not female (something I'm sure Maia is very happy about). However, if I were female, I'd find games such as My Boyfriend and Princess in Love incredibly insulting. As a guy, I feel sorry for younger women gamers who're exposed to this crap.
It's fascinating, really. As the percentage of female gamers rise, gaming companies cater to the idea that all girls care about is makeup, clothes and looking attractive for boys. You'd think that given the number of women playing games like World of Warcraft and Guild Wars (not to mention many single player games, such as Mass Effect or Fallout 3), these companies would realize that a lot of women like the same gaming experiences as guys do.
Maybe the problem is the intended audience. Pre-teens and teenagers are aimed at with these games. The Nintendo DS is also the platform of choice and is considered the "ultimate casual gaming" console (even beyond the Wii). The DS is light and portable, easy to use and comes in multiple colors -- including pink, which "every" girl loves!