Doubtful. They wouldn't announce a specific date like 11/11/11 if they didn't think they could get it released in time.
It's happened before. Whether or not a developer
thinks they can release in time doesn't generally pan out to whether or not a developer
does release in time.
Also, the game has been in production for a long time, I imagine most of what will be done between now and November will be polishing.
Similar response. Morrowind was in production for an
extremely long time, and was still pushed back after getting a release date. Oblivion was in development for a fairly long (but much shorter) amount of time as well, and the same applies there.
EDIT:
Most of the game is already done, and people from Bethesda have posted on here multiple times that there is no question that they will make the release date.
Source, please. I can't see
any modern developer saying anything like that.