(1) we live in an age when students are likely to hear more about Marie Curie than about Albert Einstein And hearing more about Bob Marley than about Shakespeare, I'm sure.
(2) even after adjusting for body size, men have larger brains than women Did I miss anything? Did someone prove that brain size is connected to IQ after all?
(3) If you'll notice, he's saying traditional gender roles were completely destroyed and even turned around in the seventies ("women were actively socialized to resist gender stereotypes") so they don't have to be taken into account anymore.
I really don't see any point in reading on to the bit about race. If he has any conclusions that actually correspond to science and to real life, it would be by lucky chance, because a scientist he ain't.