The facility I take my son to has some new batting drills/equipment that emphasizes the top hand release theories. My son tried it this evening, it was an interesting concept with the bat that is essentially hinged, then the short stubby bat that is heavier than most to ensure hitting the ball back in the "zone" and a flat bat to ensure proper palm placement and striking the ball proper. The guy that owns the place talked up Pujols and his top hand release method and how it enables a quicker movement towards 1B as well instead o fhaving both hand "finishing high" then having to bring them down to start you run to 1B. All in all, I think do what is working, try various drills and if they feel they are enhancing your hitting of the baseball do them.