Pro,

My son started playing piano this summer. He improves rapidly and enjoys it. Music seems to calm him down quite a bit. However, like most of things he does, he would not put too much efforts into it. So when the tester said his slow speed was most likely due to his perfectionism, DH and I exchanged a look, we were like " he does not seem like a high achiever to us".

Similar to your DD, he has not shown much interest in the things his same age peers enjoy, such as Pokemon.