Clinton strategist and pollster Mark Penn slams the Des Moines Register poll for adopting "an unprecedented new turnout model for the caucuses," calling it "out of sync" with the other polls.

The Edwards campaign pushed back on the poll results as well, issuing a statement that begins, " Is the poll accurate? There are good reasons to think it is NOT."

Meanwhile, as you'd expect, Obama campaign manager David Plouffe touted the poll in a fundraising email last night saying, "momentum is ours in Iowa and across the country."

The Iowa Poll nailed the results of the caucuses in 2004, but as David Yepsen points out in his analysis of the results this morning, this year the data won't reflect any last minute developments:

In 2004, 21 percent of those who showed up at Democratic caucuses decided who they'd support in the last three days of the campaign. This poll won't reflect those decisions because it came out of the field on Sunday night -- four days before people vote.

Additionally, to Penn's original point, the poll's turnout model includes a high percentage of independents which certainly works to Obama's benefit. But Ann Selzer, the pollster who conducts the DMR poll, knows how to poll Iowa better than anyone, so if she is sensing a wave of independents swelling in the electorate I'd be hesitant to bet against her.