"Women are just as good at math as men" is not the same proposition as "mathematical ability is innate". The latter is not incompatible with the former.

Further, the evidence cited here does not show that women are just as good at math as men, since the samples used were not randomly chosen. The samples chosen consisted of men and women who had already taken calculus (and some other criteria).

http://www.lscp.net/persons/ramus/fr/GDP1/papers/spencer99.p...

The articles do a good job of showing women are sensitive to stereotype threat. But that's all they show.