These test (which was originally formulated to "prove" that immagrants were inferior) measures something. Exactly what that is is debatable and the importance of that something is a lot less than some presume.

In any case the article, with it's emphasis on athletes and such, is not about genius but rather achievement. Now to be a recognized genius achievement is very important, and for achievement training, hard work and in particular desire are critical, but without the basis it is all for naught, like a guy with short legs aspiring to be a track star.