And here is some science for people who’d rather take that route.
Will Obama Outperform the Polls Again?
…a few calculations suggest that there is no Wilder Effect (AKA as a Bradley effect). In fact, the variance runs in the opposite direction, with Obama’s strength being under-represented in the public polling. If there’s any problem related to race, it’s probably that the turnout models are under-representing Africa-American turnout.