10U - Around 38-40mph is massively effective if they can hit spotsWhat would you classify as mid speed for 10U and 12U?
12U - mid-40's the same plus change speeds
I have seen high 50's in 10U from some big girls; insane to try to hit from 35'. For those who have got to college age, one of those girls in particular went on to be a SEC #1 pitcher and a total stud... the others never really got much faster or better. The rest played in college mainly in mid-D1 or D2 - some didn't even get past HS ball.
One really stands out to me - 5'8" in 10U.. and is 5'8" now and just graduated college. Gave up travel in 16U, played HS ball only. Never played in college. She loved dominating, but didn't love softball and when it came to put in the work, she just didn't want to... Which is more than OK btw. She is headed to a good Law School next semester.