Sorry, I'm not suggesting either boys are better at math or that biology is the only factor. I was trying to bring the nature side into the discussion. Also, I was also trying to bring forward the idea that cognitive ability is not subject specific. So a person good in aspects of math may not be good in other aspects of math.

I find so many people are focused on the nurture side, I figured this side is covered in most of these discussions. This is why I am bringing the nature side into it.