It’s also worth remembering that other candidates have seen similar bumps in the New Hampshire polls fade before the primary. Steve Forbes in 1996, Bill Bradley in 2000, and both Howard Dean and Wesley Clark in 2004 all found themselves at or near the top of the pack in polling that occured much closer to the first ballots being cast than the surveys showing an Obama surge. None of them managed to win the primary.
Each of the above candidates faltered for different reasons. Perhaps none of their circumstances will apply to Obama. But it’s still a little early to write off Hillary just because of the Illinois senator’s standing in polls after his first Granite State campaign swing.