https://www.kirkusreviews.com/book-reviews/joel-n-shurkin/te...
Alas, that book is currently out of print, but well worth finding in a library. To say, as the blog post author does, "IQ is as important as height in basketball" gets the main point right.
http://en.wikipedia.org/wiki/Earl_Boykins
AFTER EDIT:
I see there is a reply here that appears to be from the blog post author.
Will try something better next time. Sorry for my bad english.
I admire people who participate here even though they didn't grow up speaking English at home. That's not easy. What is your native language? What has been your process for learning English?