Seriously. I would like to watch a super fit and hard-working Kessel before I make pronouncements on his hockey brain.
Some players play a smarter game than others, ie, Gretzky vs Roenick. Roenick isn't dumb (maybe), but he plays a different way. Forward-thinking rather than lateral thinking. Crosby and Ovi play a different way. It's fine to call one smart. Extreme examples are going to work a lot better here than close comparisons.
But of course, this will get translated by the quantification-conscience hockey intelligentsia into an EA Sports model that rates prospects' IQ, before they are in the big leagues, outside of the context of their eventual linemates. And then Virtanen gets branded with, "low IQ, can't play with the Sedins", as though being a power forward with a cannon is not such a great thing.