Gingrich's surge was super-late, actually, within the last week.... but sure, even when Perry conceded, he was leading Santorum in the polls so would be a preferred "not-Romney" from a conservative perspective.
I agree that this is more interesting from a political perspective, and a Gingrich nom would (making numbers up here) have a 20% chance at best of winning the Presidency, but see Dark Holy Elf, keep these people as far from the big red button as possible. I'd also add that saying "Santorum won" vs. "Romney won" Iowa is entirely illusory considering the tiny margin of victory; as Charles Seife has pointed out, that margin is less than the expected counting error of a super-careful hand recount. And these weren't even the results of a super-careful hand recount with 3 people carefully examining each ballot. And it's not like the caucuses are winner-take-all anyway. It was and is a Romney-Santorum tie, and shame on the media for even reporting it as a Romney victory in the first place.