[Quote=ciljettu]The politically incorrect truth is that great chess players are all very intelligent and no lefty liberal doublespeak can change this fact.[/quote]
Politics has nothing to do with it.
Politics has everything to do with it. Anything which is not an empirically measurable scientific truth ultimately becomes political, in the broadest sense of the term.
I've known people who were very gifted in one area, but were ordinary in everything else. Besides, how do explain idiot savants if being good at one thing requires you to be good in everything?
If experience was so important, Korchnoi would be trashing Carlsen for fun. Chess is mainly about cognitive power.
My counter is that I don't think Korchnoi learned as much from his experience as Carlsen did. Moreover, the effects of any learning become less apparent as you move up to 2600+.
Just because experience forms the basis of improvement doesn't mean that it doesn't have to be well-learned.
You would think calculating moves is only about cognitive power, but my experience might suggest otherwise! Visualizing the board started out really hard, but it simply got easier, and easier, and easier, and easier, and it continues to get easier, as I kept practicing it. It feels so much less than superhuman now to calculate 8-10 moves ahead. Maybe the practice just built my cognitive power, though.