[Adam]

Fair enough, and I have a great deal of respect for both of you.

However, the only time I ever see "jazz hands" is in low level girls ball, and I've never, ever, not once, had an opposing coach or player complain about it. The movement isn't that big (unlike arms rising and falling).

When I played, I wouldn't have been able to see the fingers anyway.

I don't consider jazz hands to be either a hindrance or a disconcertion. If a coach mentioned it, I'd probably simply compliment the team on their "jazz hands" and see if that works.