Nah, I'd have to see some serious cross-cultural research to believe that the "girl's game" is a universal, as would anyone who's had a whiff of anthropology at any point in their education.

Also, speaking as a bisexual myself, I'm kind of offended by your characterization of bisexuals, unless by "bisexual" you mean "intersexed" or "transgender" or something, which in itself is actually just as offensive. Being queer doesn't mean engaging in stereotypical, effeminate behaviors like the ones you're describing.