IMHO, the better shows are on at 12:30 with Craig Ferguson and Conan O'Brien.
This time slot is a lot more forgiving and you can get away with a lot more.
Conan will likely suffer the same fate as David Letterman for the first while he is on at 11:30, in he will have to tone down the show. Letterman lost an awful lot of edge when he switched to the 11:30 slot which is too bad, because he is funnier than Jay Leno.
I think that NBC will keep tight control on Conan, making sure that he shifts into the "Oh dear god, do not offend anyone" role that network execs are aiming for these days. In all honesty, I would not be surprised to see the show fail...I am not sure how many of the writers, band, back-stage folks are going to want to move from New York to LA.
Should be interesting to see.
But hey, I prefer the Late Late Show with Craig Ferguson. That guy is a genius.