Reality is a crutch for people who can't cope with drugs

Borrowing from systems theory, the "relaxation rate" is the rate at which it takes a system to return to homeostasis after it is challenged by external input or stress.

Humans are presented with increasing information, concepts, and stimulation. The cognitive system never gets a chance to fully relax. I think this is what is behind the supposed increase in ADD (aside from American's being pharmaceutical-happy).