That was my main reason for leaving another SW messageboard (before finding this one). Actually, the nimrods there were professing the superiority of the PT over the OT.
I really don't see how anyone can actually believe that the dialogue in the OT was as bad as the dialog in the PT. None of the SW movies were perfect but there are some truly wonderful, funny, touching, memorable lines in the OT.
I don't recall the exact quote, but I remember seeing Roger Ebert review AOTC on his TV show, and he said something to the effect of "I can't imagine anyone reciting a line from this movie with any joy". That pretty much sums it up.