I would certainly question it... one of the key factors in an ADHD diagnosis should be "do the behaviors exist in ALL environments?" If the answer is no, I would seriously doubt the diagnosis. Now, obviously, you don't really see ADHD symptoms when they are doing things they love, but, in general you'll see problems at home, at school, and in recreational situations like soccer practise.
Also, my son, who has ADHD, had scores like so:
VCI = 100
PRI = 145
WMI = 107
PSI = 109
The VCI is likely a result of his PDD-NOS, but the low working memory and processing are a combination of ADHD & anxiety.
