Sure but I think that is the exception rather than the rule. You can correct me if I'm wrong malletjazz, but I think that these people who have the skills to be able to read music and play musically at the same time are very rare. In some cases, I would think all that much time would not be saved because if the piece is complicated they won't be able to play it 100% correctly and they'll have to go back and do it again, etc.