There is no flavour of adhd that does this, their intelligence spans the same ranges as any other people. But they do have a lower attention span which is why I referred to them.

The article literally refers to “lower measured attention span” as “being dumber” and thats just unapologetically incorrect. There is no indication of a proper IQ tests being involved.

That said there are so many different kinds of intelligence that we don’t measure or have tests for, being bad a one that does have tests is indeed nothing to be ashamed for, you are correct on that part.