I've said before that the designers of this game thought things out pretty well.
SO - for all those chest-thumping dads out there, let's put things in perspective:
A 10u throwing a pitch @49mph from 35' provides a batter with roughly .445 seconds to react from release point to hitting zone.
A college pitcher throwing a pitch @62mph from 43' provides a batter with roughly .440 seconds to react from release point to hitting zone.
Pretty close in batter reaction time.
So you see? It's not so much about how FAST the actual pitch is, but rather how much time the batter has to react. It's called age-appropriate effectiveness.
Now, to burst your bubble: There are about as many Ohio 10u kids throwing over 50 as there are Ohio 18u kids consistently throwing over 62.
P.S. - HINT: If you do the math, remember that the pitch is not released at the front edge of the pitcher's plate, nor is the beginning of the hitting zone at the back tip of the white on home plate.