learning, cognitive ability, problem solving - something to look at as those are abilities are necessary but that alone won't predict performance.
Don't really know about on average how they performed but came across which made me laugh.
But some NFL coaches may think a guy can be too smart. If you don’t believe us, take it from Pat McInally, the only guy who ever scored a perfect 50 in the Wonderlic.
McInally believes the performance actually drove him down the board.
“How did it hurt me in the draft?” McInally told Rivals.com in 2006. “Coaches and front-office guys don’t like extremes one way or the other, but particularly not on the high side. I think they think guys who are intelligent will challenge authority too much.”
http://profootballtalk.nbcsports.com/2011/02/28/pat-mcinally-thinks-perfect-wonderlic-score-hurt-his-draft-stoc/
That said, scoring too high can be as much of a problem as scoring too low. Football coaches want to command the locker room. Being smarter than the individual players makes that easier. Having a guy in the locker room who may be smarter than every member of the coaching staff can be viewed as a problem — or at a minimum as a threat to the egos of the men who hope to be able when necessary to outsmart the players, especially when trying in some way to manipulate them.
http://profootballtalk.nbcsports.com/2011/02/28/greg-mcelroy-gets-a-48-on-the-wonderlic/