THat is kind of interesting. I have formed my own theories about some of the stuff covered in this article long ago. Having spent a large part of my youth with fellow chessplayers of various strength I have found that Intelligence generally is not such an important feature as one might think for becoming a really strong chessplayer. For example I was good friends with a very (exceptionally!) talented mathemathician who never seemed to be able to achieve master strength in chess. At the same time people I would consider at least not above average intelligence became really strong players, even GMs. This is the reason I believe that there exists such a thing as a "chess-gene", a certain mindset and talent needed to become strong in chess. In the article they touch upon many things that I think are related to this, such as pattern-recognition. The other thing that is left out here is that you really need the ability to work very hard and focus on chess in order to become really strong (say, above 2500). Whether or not I posessed the chess-gene I'm not sure, but I know that I was never able to focus so totally on chess as one needs to do in order to improve after a certain level. In other words: I was too lazy. I also do believe that many of the features required to become strong can be acquired through dedication and study. I have friends who became IMs without any special talent for the game, but they all had a tremendous capacity for hard work.
Interesting stuff!
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You might enjoy this article: http://www.chess.com/article/view/mentality-and-chess