Is this really surprising? The whole Republican primary has been a game of ABMR/ABBO musical chairs:First Bachmann,then Perry, Cain, Newt (who most on FR ruled out early on last year) and now maybe RS gets his turn.
RS has a big plus now, he is not Romney or Newt. In comparison to them he looks like a pillar of consistent values, agree with them or not. Newt's sore loser speech after the FLA loss was a flag that many Republicans voters saw and will remember. That is the real Newt.
I thought his FL speech was pretty good. But the not congratulating the winner thing was a tactical error, he did not need to create that story.