That data for typical genes shows no such thing. Once again, Glenn's argument is ill-formed. In addition, Glenn model of the how genetic variation accummulates in a population is wrong. That is flatly wrong. It does not correctly model the way human populations accumulate genetic variation.
Humans are diploid.
Those two factors were left out of Glenn's model. Thus, Glenn failed on all three legs of his argument. He failed to understand the genetic variation that could have plausibly been present in the original population. He incorrectly modeled the process whereby genetic variation is accumulated. Sorry for the shouting, but virtually everything I am saying in this post Glenn has already heard before.