I think what we see here is that for simply getting on base exit velocity is king. 91-103 is really a pretty small span compared to 7-28 degrees of launch angle. However I still can't agree that singles are productive enough for us to teach toward them. Certainly when my kid drops a single into the outfield I am happy. Just happy he got on. But that's not really the goal. So to the original purpose of this thread my opinion is unchanged - launch angle plus exit velocity is what it's about. Mark the cage or do whatever but coach to launch angle AND exit velocity. Neither matters without the other. A nice 25 degree launch Andre at 75mph is probably a fly out. A smoked 100mph ground ball has a pretty decent chance to get through the infield for a hit. But the holy grail is the 100mph+ exit velocity and 25 degree launch angle.