Well, he followed that up with "twist and cherry pick the data". Certainly, truth is truth and "dumb and backwards" is misused to dismiss truths that go against a given sensibility regardless of whether the sensibility itself is actually rooted in truth. But the concern here has to do with cases of unjustified presumptions about particular people based on group membership.
What I found problematic is the phrase "automatically assume every individual in a given group conforms with these trends." In the context of this study, clearly, we all know that not everyone does conform. That's why people will describe men who exhibit typically feminine behavior as effeminate and women who exhibit typically masculine behavior as butch.
The question is what is the relation between statistical typicality and normativity? I would say that statistics carried out responsibly and in a broader context involving causal explanation can greatly aid in distinguishing properties from mere accidents, that is, traits proper to and (formally) causally entailed by a given sex versus traits are not intrinsically related to sex. So in the first case, we may speak of defective males and females. For instance, a male born without a penis or a female born without a uterus are defective in relation to the norm that follows from the sex. This is different than the case of a man or woman without the capacity for speech, where speech is proper to humans by virtue of being human, not something particular to a sex. These stand in opposition to traits that might only deserve a relative ranking (inferior and superior in some respect or in relation to some end, but not defective per se and further still not sex-specific). Similar things may be claimed w.r.t. so-called personality differences.