I'm a female gamer, and I'm one of those people who really doesn't like the Wii as a system. I play the Xbox 360 myself.
By the way, you should really leave an option in the poll for the PC.
Personally, I think it's a case of the Wii being the console of choice for people who don't ordinarily play games. If there are women who have never played video games before, then, yes, the console they're going to get is the Wii. That doesn't necessarily make them 'female gamers' in the traditional sense, the same way someone who only plays The Sims isn't necessarily a gamer.