Well, at first I thought they had only said "Can't be verified," which would have left things in dispute (because outwardly I cannot not find any reason to believe your link more than the other, aside from the absurdly low scores on the first), but now, judging by how the Economist hastily ran away, I absolutely agree with you, yes... sorry for duplicating you.
Still, as I say, Kerry DID get the graduate vote. If you did a straight IQ-vote analysis you probably would get a Kerry bias, but to simplify it like that is a disservice.
For example, one of these political studies says that the higher your IQ is, the more you earn on average. Yet, the analysis of the 2004 election shows the richer you are, the more likely you are to vote Bush.
It's very complicated and needs a lot of work to show any significant result.