Thanks for being so patronising but I didn't need to read the studies because I've already done so sweetie...
So, some things you might want to know:
Melissa Hines (author of many of the studies in your link) has spoken several times of the need to reduce society's influence with regards to gender stereotyping. She bases this on her findings that boys were more likely to play with a variety of toys when their parents weren't in the room. She knows society matters.
The monkey study was criticised for being subjective in its interpretation. Cooking pans were regarded as a girl's toy and the female monkeys' preference for them used to back their theory. How can a cooking pan be classified as a girls toy when monkeys don't cook?
And if you'd read my words you would have seen that I had said "not much of a biological component". Doesn't mean that I think there isn't one, just not a big one, certainly not enough to merit the about of pidgeon holing that goes on in society.
Back to my original assertion - if we take the toy choices of female monkeys to be an indicator of girls' nature, girls are obviously being heavily socialised away from their true nature. You should focus your energy on that rather than banging your "it's hard-wired" drum. Cos who gives a crap about that anyway?
Biology may well have an effect, sure. We can't know how much of one. What we do know is that society certainly does because countless studies have also proved that. But you ignore that because it doesnt fit in with your viewpoint.
As for the "feminists don't want to believe it" argument. Nonsense. I'd be happy to believe in "Different but Equal" as it's a much better situation than what we have now. But it's simply not true and the real situation is a lot more complex with a lot more overlap that you would like to believe.