The battery life has been fixed for quite some time, from what I've heard. With that said, most of the account reps aren't told or aren't allowed to tell you anything. We are typically contacted by AT&T Mobility's highest persons in both the technical and national sales spaces and/or the carrier liaison at RIM for information. This is pretty standard across the board, which is only the first line of confusion for those of us who keep up with the rumor mill.
If AT&T delays the Bold's release for two months, then it will likely be for one reason alone... and it has nothing to do with improving battery life that cannot be improved any more.
In the beginning the Universe was created. This has made a lot of people very angry and is widely regarded as a bad move.