Oh God.
Look, these polls, especially the summer ones, have all kinds of internal screw ups. McCain gets like 20% of the black vote in NC in the polls released. Does that mean that he'll get 20% of the black vote in NC in November? Obama won't improve on Kerry's white vote numbers because Edwards is not on the ticket and the old, white Dixiecrats who still vote Dem will not vote for a black guy. It just isn't going to happen.
Once again, I think the theme of racist voting patterns is overplayed... NC is an extremely economically vibrant state with a fast population growth rate, many of those professionals and working-class folks from Northern states. The climate is nationally extremely bad for Republicans compared to '08, and NC whites are not some monolithic entity of stereotypical NASCAR dads with confederate flag bumper stickers.
Is it totally unreasonable to think that Obama might be able to slightly improve on the Kerry 27% White vote?