That's not what I was saying, and if that's what you read, I will take the blame for phrasing it improperly.

This article is about a particular combination of Introversion and High IQ. It is one combination of many.

Obviously it's possible to be a different combination: Extrovert + High IQ, Introvert + Low IQ, etc. I did not mean to imply, in any way, that Introversion is correlated with IQ, much less axiomatically correlated with high IQ.