I find all this Republican mind changing hard to believe. I work with three guys who have never voted in their life that registered this year just to vote against Obama. I have yet to run into a Republican that is going to vote For Obama no matter how much they dislike Romney. I have never seen Republicans around here more fired up. And I've run into many Democrats that have a lot of buyer's remorse over Obama-they may not vote against him, but they are not thrilled voting for him.
Granted, this is a very miniscule sample size, but it's a sample from a state that is guaranteed for Obama.