I think two factors involved are how the pitcher learned grips and how much exposure the backswing motion gives. If a pitcher has three different grips for three different pitches, it would be important to hide the ball longer. If a pitcher has a long, slow backswing out in the open for everyone to see, there will be more picking.Not really arguing against pitching out of the glove, but wondering how much pitch picking actually happens. Abbot, Osterman, Ueno, Ocasio, etc. all use backswings. Is it worth spending the time on? I'm guessing if your DD has switched then you feel like it is, but Fouts didn't seem to be having much trouble before.