Presuming polling is accurate (and that's a big if) I wonder why Mittens's supporters have defected. I feel confident that his base is the moderates, and don't know what he has done to alienate them or even more so, what Cain or Gingrich have done to attract them. Maybe it's partly an intertia bandwagon thing.
Romney has three types of supporters:
1. Moderates. These people haven't defected (at least not to Gingrich, though Huntsman is making significant inroads in NH)
2. Mormons. Loyal to the end, obviously (again, except maybe to Huntsman, but only if Romney collapses/withdraws)
3. Establishment-trusting business people. These are probably the people defecting. They didn't like Trump or Bachmann or Perry or Cain because all of them look like loose cannons. (Perry less so; he made some inroads with this group before collapsing.) But Gingrich is a known quantity to them and was a pretty solid ally of theirs in the '90s.
