The first post-Gore poll is out from Iowa, and the number shift is real. Gore travelled to Iowa with Dean on December 8. This poll was conducted 12/8-10. MoE 5%. (November results in parenthesis.)
Dean 42 (32)
Gephardt 23 (22)
Kerry 15 (19)
Edwards 10 (11)
Other 7 (10)
Undecided 4 (6)
I can't wait for other polling operations to chime in. Regardless, it's clear Gore's endorsement is objectively significant.
(I don't have the internals. If you have them, post them in the message boards.)
Update: Just checking in and I realized that I flipped Kerry's numbers. Sorry. Now I have to get on a plane and go home.