Not to be a negative nancy, but I have seen and worked with some girls that have been going to see some of the above listed coaches, and sad to say, they are stealing the girls' money!
For example, one of the coaches told a 12 year old that on her fastball her arm had to come thru sideways with her thumb first, because "her wrist was small" REALLY!! Instead of telling her she is closing her hips too soon and throwing around her bottom, she told her it was okay because she supposedly has a small wrist! That's bull!
Another example, I worked with a girl that was crow hopping, no drag of her back foot at all, and I said why does your pitching coach let you do that? and her response was "he/she doesn't care, as long as I throw strikes"
I've seen recurring bad habits/mechanics out of a lot of girls, and I just wonder how could so called coaches steal people's money like that?