Steve Sailer demolishes in short order the ideas of Malcolm Gladwell here. Gladwell is a real intellectual lightweight. His grades were not good enough for graduate school. There is nothing creditable about propounding striking ideas if those ideas are wrong or unproven. I think it is mainly the bush of African hair on his head that gets Gladwell uncritical acceptance. He runs fast, though. I have mentioned previously the demolition of Gladwell's most recent book by Christopher Chabris, a psychology professor and psychometrician.
It is generally conceded, however, that Gladwell is a good entertainer. It is perhaps in that light that we can understand the success that his academically unsatisfactory writings have brought him.