I suppose this is a prejudice like any other, but one of the things I remember from my brief stint in a church choir (in a very small church where they had to practically beg people to join the choir) is my annoyance at the choir director telling us we should pronounce vowels in a different way than we did in ordinary speech, e.g. "supplicate" should be "sup-plee-cate." I remember thinking, if my ordinary pronunciation isn't good enough to worship God with, why am I here?