This is hard to tell. ADHD can take form in a lot of ways and it’s hard to say if someone counts as having minor ADHD. I think it’s a pretty safe thing to say that Max Park, who is on the autistic spectrum, is the fastest cuber with some sort of, as you called it, “disorder”.
I’d also like to point out this is a quite insensitive question, and I usually think it’s disrespectful to discuss