yeah i totally didnt read his post to realize it was opera that he was recording
using too much compresion on opera vocals can actually change your perception of the notes that are intended to be heard. so can distance (but it would have to be a huge distance).
i love autotune. a lot of the rock (hinder), hard rock, emo (my chemical romance), screamo (who the fuck knows?), and even metalcore (all that remains) have auto tune. you're definately entitled to your opinion, and i agree that auto tune on opera would fucking seriously suck. but i must say, no human is perfect, and a lot of good singers arent actually that good because singing in tune with perfectly tuned instruments in a very clear recording isnt easy at all and takes way longer to get useable tracks before the voice is shot or sounds different in each part. i seriously doubt you're recording great singers day in and out. even the best singer i've had in the studio had to have auto tune for 2 parts of a song.