Going off the subject a bit.I appreciate the responses so far and maybe I should have asked the question a little bit different. She is playing 12u A tournaments and throws her fast and drop cruising 59-61. She does not tip off her change that coaches or anyone can pick. She can locate it for strikes but we can’t get the speed up over 40. Which leaves about 20mph difference. For 75% of the hitters it works great but for the very elite hitters the speed difference seems to much and allows them to reload. We have been working hard on increasing the speed to get in that 12 mph difference. I’m wondering if we need to work more on a different change up and have two different speed changes or can you get the flip speed in high 40’s low 50.
Pitching 60 mph from 35 feet away is the same as pitching 73.8 mph from 43 feet. I suspect there are no 12 year olds out there who can hit your daughter's fastball. From 35 feet, I suspect there are not many 18 year olds who can hit your daughter's fast ball.
Maybe the elite 12 year old hitters are just sitting on the change up?