Wait and check her speed when she's 16. lol
I have a pet peeve about other pitching instructors that feel the need to belittle other instructors. There's plenty of girls to teach/coach. Why tell a parent of a 10-12 yr. old that if they'd quit me and go to them they'll have them throwing harder in a year. DUH, she's a year older and with natural and physical changes will almost certainly be able to throw harder. Come on parents! Compare apples to apples here!!! If you go to another instructor teaching the windmill motion, look hard at the basic mechanics and see if there really is any difference in the methods taught. Most of the time the answer is no so that means you left me getting free lessons as often as you signed up to come see me for an instructor that charges you hard-earned cash by promising the inevitable, that if your daughter gets older, bigger, stronger over time she'll throw harder. Hmmmmmmmmmmmm????????
If you guys like the other instructor, your daughter enjoys working with the other instructor, if they are more convenient, closer to home, or have better hours I can see why the change. Some girls simply react differently to new methods of teaching. I'm a boring old cuss to some while other girls seem to look forward to coming every week. I always encourage my 3rd year students to go to clinics or try other instructors to see what is out there. Maybe they'll find something better for them. I want the parents to see so they can rest assured I'm doing my job. I would recommend the same to any 1st or 2nd year girls if they question what I'm doing but tell them if they wait, they'll know more what to look for then if they simply run off without the knowledge beforehand.
Parents be alert to the door to door salesmen selling snake oil. Shop for a pitching instructor teaching the proper mechanics and work on the craft at home with the drills the instructor shares with you. Be your daughter's motivation and be there for her as she practices at home. Girls like to be watched. Boys will go play and practice by themselves but girls want an audience. Sit on a bucket and be a cheerleader. This will get you more improvement than anything else you can imagine. Good luck.