Seeking expert testimony is a sign of strength. A personal relationship with a caring professional is proven clinically effective.
There is nothing wrong with your son. He is age appropriate and because he does not want to have his energy and curiosity stifled by these stilted instructors, they want to imply that he has ADHD. That is where they (or she) is going.
He is only 2 1/2 years old and he must not be stifled. Perhaps he would be better off in a different environment.
I would not want my grandson there.
I wish you great success in allowing him to grow up as a real old-fashioned boy and not forced into a mold or restrictive thinking when he is just starting to find his own rhythm and interests and means of instruction.
I shall keep your family in my prayers.
Elliott, MAE, LPCC, NCC, CCMHC