The huge turnout in caucus-goers obviously was the difference in sealing the Obama victory in Iowa. However, among those who caucused before and returned to caucus this time, Edwards won handily. The second choice votes went to Edwards by a large margin according to 'entrance polling.'
The real question to be answered in New Hampshire is will there be a 'huge' turnout of first time voters at that primary who have to comply with more stringent voter registration requirements than Iowa?
http://tpmelectioncentral.com/2008/01/entrance_poll_obama_won_on_high_turnout_and_edwards_lost.phpEntrance Poll: Obama Won On High Turnout — And Edwards Lost
By Eric Kleefeld - January 4, 2008, 1:44AM
"Here's another figure from the entrance poll: An astonishing 57% of caucusers were first-time participants. And how did they vote? Barack Obama carried them with 41% of the people going in and before second-choice reallocations, followed by Hillary Clinton at 29% and John Edwards at 18%."
"And among the returning caucus-goers? Edwards was carrying them with 30%, with Obama at 26% and Hillary with 24%."
"This tells us two things. First, Obama's strategy of bringing in new caucus-goers worked, the first time in recent history where such a strategy actually did so in the caucus. It's a big change from when Howard Dean tried it with less than impressive results. As for Edwards, his problem was that he fought the last war — if the caucus' turnout had been more like 2004, he may well have been the winner."