Lot of good comments that make sense regarding actual speeds. My DD`s instructor, Doug Gillis, tells her not to focus so much on speed but proper spin. If you have proper spin with high revolutions you have a good starting point. When adding speed you want to make sure you maintain your proper spin and revs. A lot of pitchers that can throw in the upper 50`s lose proper spin and revs which makes the ball remain flat through the zone. At the younger age groups a pitcher who has some speed can get a way with very little break through the zone. The older more experience girls that have developed a good data base of pitches will be able to catch up to the speeds remaining flat. My DD has been very successful these past few seasons and she throws consistantly 52 - 55. One thing about radar guns and it has been stated on here in the past is they will at times read a few mph higher because they will pick up the spin of the ball too. So a drop ball with good spin reading 57 may actually be traveling @ 54 - 55 mph.