Final Iowa poll: Romney 24, Paul 22, Santorum 15, Gingrich 12 (bumped)

But the four-day results don’t reflect just how quickly momentum is shifting in a race that has remained highly fluid for months. If the final two days of polling are considered separately, Santorum rises to second place, with 21 percent, pushing Paul to third, at 18 percent. Romney remains the same, at 24 percent.

“Momentum’s name is Rick Santorum,” said the Register’s pollster, J. Ann Selzer.

Another sign of the race’s volatility: 41 percent of likely caucusgoers say they could still be persuaded to change their minds.

Update (AP): Historically, the DMR’s final poll has been reasonably accurate.