> It seems more like a horoscope to me - everyone can find themselves in the criteria. It’s an observable thing, I’m just not sure I buy its special distinction

Do you think the same about conditions like Autism or OCD?

People often say they "are a little bit" OCD or autistic, but it's the degree to which those traits are experienced which is the differentiation. There is also no objective test, it's all "soft" science.

> People also used to make the claim that the stimulant drugs had special effects (or even opposite effects) on those with ADHD vs. the non ADHD population

This is my experience, but I understand that anecdotes aren't good evidence.