Gallup 'very enthusiastic' numbers show Republicans hold a 51-28 advantage over Dems. PPP did not find such a large enthusiasm gap.
Public Policy Polling
MONDAY, JULY 19, 2010
The Monthly Generic
Among voters who are 'very excited' about voting this fall Republicans hold a 52-40 advantage. How much that matters is up for debate though. Scott Brown led the Massachusetts Senate race 59-40 with 'very excited' voters but won by only 5. Chris Christie led the New Jersey Governor's race 60-34 with 'very excited' voters but his final margin of victory was only 4 points.
As I've said before unexcited voters count the same as excited ones and our polling so far this cycle has suggested the Democrats who answer our surveys vote, whether they're excited about it or not. So I'm not sure how much the wide GOP advantage with 'very excited' voters really matters.There continues to be no doubt this fall's election will have more to do with whether Democrats can turn out Obama voters than keep them in the fold. Very few voters are shifting their allegiance from the 2008 election- 8% of Obama voters say they'll vote Republican this time but an almost equal 6% of McCain voters say they'll vote Democratic this time. When it comes to voters switching sides it's basically a wash, but Republicans are doing well across the country due to Democratic disengagement.
http://publicpolicypolling.blogspot.com/2010/07/monthly-generic.html