It's obvious that there are statistically significant differences in IQ between the two genders and among the various races/ethnicities/whatever. And I'm willing to accept that some of this could be due to genetics and other inborn factors (the rest being due to nutrition and social factors), although I'd put less emphasis on inborn differences than this guy, and I'd put less emphasis on IQ in general than this guy.
But even if there are unchangable racial differences in intelligence, methinks this man puts too much stock into people's rationality. Homo economus ain't all that accurate of a model.
It'd be nice to think that if there were no taboos relating to racial differences, your average (and even your below-average) person could objectively look at the facts and decide, as the author says, that it makes sense to look at the individual, but at the same time not expect collective equality among the races.
But in reality, I think people would succeed in realizing the latter, but not the former. These pyschological studies would just be used to fuel racism, as others have said.
Then again, I'm not much of a fan of censorship, and perhaps the suppression of talk about racial differences does more harm than good, fueling racism in its own way. Yes, that's a very real possibility, but I think I'd like us to play it safe and take over-political-correctness and silly affirmative action over no such political correctness and the possibility of reverting back to 1963. [Edit: I'm exaggerating in that last sentence, of course.]