I really think that any Romney collapse has been reversed by these stupid Bain attacks by Gingrich. As a consequence, i expect him to over-perform and the Conservatives to crash.
Romney 41%
Huntsman 19%
Paul 17%
Santorum 10%
Gingrich 8%
How?
Because they are dominating coverage, and the way they are being covered is "Are they an attack on capitalism or not" not "Is Romney a shady businessman". They are doing far more damage to Perry and Gingrich, and by doing so they are giving conservatives an excuse to make their peace with Romney's nomination.
That said, I don't think they will have an effect on Paul's voters, and I dare say the first debate this weekend did a lot of damage to Romney vis-e-ve Hunstman because those social issue questions did matter.