Just had this conversation with my son last night. "dad my coaches keep telling me to hit the top half of the baseball, if I do that I won't be hitting gap shots but just hitting ground balls". We agreed that he should keep doing what he is doing. They have only swung in the indoor cage so the one coach thinks he is just popping them up, he said they are bombs; 1st scrimmiage today if the rain holds off so I guess we will see.
Never did buy into the whole back spin thing but a lot of smart baseball people preach it so I always took their word for it.