I'm not so sure. It just came out today that Romney had a President-Elect transition site assembled and he had planned a large fireworks stunt in Boston to celebrate his victory. You don't make those sorts of moves if you think your chances are poor.
Doesn't mean a thing. They plan the transition stuff a long time before the election (you'd have to) and they'd need to do it whether they thought/knew they were going to win or lose. It would be bizarre if they didn't do it. As one of the articles on it points out, transition planning often begins 2 full years (years!) before the actual election.
So no, this doesn't really indicate that he thought he'd win, or that the fix wasn't in. It's just something that is done, regardless. It would be odd if they didn't plan for a transition, that they did is standard operating procedure.