I don't really know anything about the Wonderlic, so I won't comment other than this: I'd much rather judge someone by how they function in reality than how they perform on a test. I thought the SAT was a pretty easy test, but I know smart people who didn't do well on it. My prior experience tells me I shouldn't judge intelligence based on a test instead of how they function in reality.
There are alot of football players that never say anything of substance. About 90% of the league, actually. What Bills player ever says anything of substance? Does that mean every player on this team is stupid? No, it just means they're athletes, and the answers to the questions they're normally asked simply don't involve any philosophical revelations.
You can dislike him without insulting his intelligence.
You can have whatever opinion you like. What bothered me was when you said he's "obviously not too bright." If its so obvious, why don't I see it? If you had said "I don't believe he's too bright," I probably wouldn't have even posted...but when you said it was an obvious certainty, you suggested that any intelligent person would realize Vince Young is stupid. If its so obvious, you should be able to back it up without saying, "Its just my opinion."