> * Being asked to explain things over and over again and STILL not being believed
> Unless you're telling me there aren't any early-childhood or nature issues in the mix as well, there is not a lack-of-belief issue here.
There are absolutely early-childhood issues at stake. They are covered extensively in the Unlocking the Clubhouse study. It's really a fantastic read.
As for the nature issues, here are three things to consider:
1) Studies which show a lack of difference tend to not get published. This messes up our understanding of gender issues a heck of a lot. This is feminist science studies 101, in a nutshell.
2) Even given that, there is some interesting research and data that shows that a lot of the perceived math/science gender differences are cultural and experiential, rather than in-born. Here's a fascinating one from the school I'm studying at: http://www.sciencedaily.com/releases/2007/10/071024145626... . There's also interesting data from places like Malaysia where software dev is more like 50/50 men and women.
3) Even if nature does come into play /at all/, its influence is so eclipsed by culture as to be irrelevant. And, well, we can't change nature, so let's focus on the things we can change. Arguing about how much of a role nature plays doesn't really help us get more women involved.