It's a distinct possibility, but I do have trouble imagining Mason Dixon being off by over 6%...
That's why this site is good. You CANNOT look at one poll. You have to look at all of them. If you think that Romney is going to win FL by 6%, you're out of your mind. Look at all the recent polls in the aggregate.
If the Seniors/youth vote shows up in a big way and if the GOP thinks they've lost and fail to show, the president wins the 29 EVs.
I agree that the polling average is what matters. That's why an Obama win isn't out of the question. It'd still mean that Mason Dixon was more than 6% off. (Statistically possible, of course, but unlikely)