Very interesting! These data mining studies are great for passing time (For e.g., I always knew that rap & religion make you dumb(er); I like Beethoven so I am bright). But too generalized due to the generic music mentioned in facebook profiles.
Beethoven > Classical by 400 points? Where would Mozart, Bach or Mahler stand then?
Norah Jones >>> Jazz? No Diana Krall / Miles Davis / Coltrane stands a chance?
I'd be interested to know where Opeth would stand.
Counting Crows? I'd rather be an idiot.
On the flip side, this may be true -
Heavy metal 'a comfort for the bright child' - Telegraph
And this too

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Does anybody else think that music sounds better when you are drunk???