Please don't take a tiny offhand comment that has nothing to do with the key point of the essay as a personal attack on you. That comment there isn't hurtful or perpetuating anything about you.
I didn't take it as a personal attack on me. And I'm sure it wasn't intended as an attack - just as those that call things "gay" don't mean that as an attack, and those that call things "retarded" don't mean that either.
Sure, it was uninformed, but I honestly don't see how that was a hurtful stereotype. He wasn't implying that everybody with ADHD loves meth and Jolly Ranchers. How is the misconception that meth decreases attention span a hurtful stereotype against those with ADHD? I just don't see it.