These replies seem to reinforce why I'm a huge fan of AT...at least for the purposes of what I'm using it for. When it's in the EFX bin of a post-comp, ready for mixing lead vocal, I can put it on "auto" mode with slight tuning and slow speed and literally watch the red light flat/sharp "flutter" in the pitch errors IN REAL TIME as the track is playing...and make adjustments as needed. Basically, I'm listening for transparency with no sour notes or obvious pitch corrections. (When that's the case, I can do surgery on the offending clip...).
It sounds to me that with the 20,000 things that Melodyne can do better, for this purpose...AT still wins. I'm still eager to learn more about Melodyne and wish my old AT DX plugin ran in my 64-bit X3 setup... =(