One of the things that happens is that as your grow, you start to adapt to dealing with it. You learn how to study with it. You learn how to self medicate. You learn how to maximize the intensive focus; and you learn how to keep the impulsive stuff to a minimum.
Please correct me if I am understanding you wrong.
At 3 years it wasn’t that the medicated kids had regressed, it was that the non medicated kids had become better at coping and regulating themselves.
Is that what you meant?