But if you care to explain it to me, I'd love to hear all about the Gaussian distribution and how it validates his statement. In layman's terms of course 
I didn't pay careful attention. He did have error by stating "average" where he should have stated "mean".
You are welcome to debate the validity of "g" with psychometricians, but I will just point out it has a high correlation with level of education completed and type of jobs attained:
https://en.wikipedia.org/wiki/Intelligence_quotient#Other_accomplishments
https://en.wikipedia.org/wiki/G_factor_%28psychometrics%29#Academic_achievement
And I note that the ability of readers (at least amongst those who post comments) to handle the abstraction in my statements seems to be rare. Instead readers seem to need me to spell out all the permutations of details that are embodied in abstract statements. For example, frankenstud has another set of myopias which I didn't bother to explain to him.