Apparently Romney's team has been putting him through boot camp with preparation. He needs it, and I bet he'll still say something unbelievably ignorant.
I actually think Romney will do well. I think he'll go out of his way to try to convince the American public that his ignorant remarks showing him to be "out of touch" are not really indicative of who he is. He's going to try to play nice and downplay expectations about his own performance so it seems even more impressive when he does decently (hence his team's recent comments about Obama being a fantastic orator etc. etc.). Romney is the one in hot water; Obama can just play it cool and the election is his barring an embarrassment and/or epic collapse on the national stage.