In brief, we have seen tonight that the gender gap in mathematics has been stable for at least half a century; that sex differences in ability-distribution means and variance ratio are independent of race, culture and geography; that female math performance is closest to that of males in high-IQ countries; that culture plays a role in math performance, albeit small; and that the theory of Everyone accounts for all of the above. If these results are unsettling, take comfort knowing that no presentation of fact, regardless how compelling, will keep the gap buster from her noble calling. _LaGriffeduLion via Dennis ManganTo follow the reasoning that leads to LGdL's conclusions, you will need to read his article at the link above. It is accompanied by a large array of graphs which aid an intuitive grasp of the statistics involved.
The gender gap is ubiquitous geographically and culturally, and is persistent over time. The gap is somewhat narrower in societies with higher average IQs, such as Europe, North America, East Asia, and Oceania, but still quite undeniably present and persistent.
The continuing effort of feminists in academia and journalism to deny what is obvious to anyone who looks at the issue scientifically, undermines the credibility of feminists on a wide range of issues which straddle both the scientific and political spheres.