It may just come down to that...and the proprioception that Rick and Ken talk about....So the question is, are these girls not developed enough to learn pitching?
Had a nine year old last spring; absolute beginner, heart of gold, strong desire to do well. But she looked like a rag doll in a tornado with twists, turns, and limbs flailing in every direction. This definitely was the right hand not knowing what the left hand was doing and no coordination. I'll be interested to see if she tries again this year.