One thing I have heard, and this is sort of similar, though in a backwards way, is that position players really prefer a pitcher who is going to keep the game moving, rather than slowing it down. From what I understand, the human rain delays always get more errors committed behind them, because players just aren't quite as sharp and ready to make plays. Maybe that translates to the plate as well. If you're going to be lethargic in getting the ball up to the plate, the rest of the team follows suit.