I think that statement is most accurate with the word "vaguely". This sort of mental state/behavioral disposition and A.D.D. are mutually exclusive. In fact, usually people who are this way are introverted and rather calm natured.
Turns out, when somebody has diagnoseable ADHD, then the corresponding treatment options apply. And there's not a thing they can do to solve their problems which is more effective than treating ADHD according to well-proven guidelines.
I can recommend "Pay Attention! ADHD through the lifetime" from Coursera. That MOOC goes into quite some detail about how ADHD affects people.