Ignoring the beauty contest in Missouri and taking the ballot vote in the caucus states (which he'll probably underperform in delegate selection, given that he's the least organized of the candidates), here's how Newt Gingrich has done so far by order of finish:
4th, 4th, 1st, 2nd, 2nd, 4th, 3rd
That's just better than a fringe candidate. I mean, Ron Paul has a couple of second place and a couple of third place finishes, plus at least a plausible case that his delegate totals might be better than his caucus straw poll numbers; Newt can't even get on the ballots or file full delegate slates everywhere.
He could surge again. It doesn't matter. He's not going to be the nominee, he's highly unlikely to be a major factor, and I'm not really convinced he deserves more TV time right now than Ron Paul.