Not quite, but I think there's a lot of overlap between ADHD and autism, and that the labels are becoming increasingly blurry.

The final paragraph touched on it:

> It is, I think, too early to say with any confidence that autism and ADHD (or KCS) share a common root in monotropism, but the overlapping traits of the people receiving each label clearly demand some kind of explanation, and preliminary results do suggest that each is strongly correlated with monotropism – especially in combination.

Also, a definition of monotropism from their homepage (not my writing):

> I believe that the best way to understand autistic minds is in terms of a thinking style which tends to concentrate resources in a few interests and concerns at any time, rather than distributing them widely. This style of processing, monotropism, explains many features of autistic experience that may initially seem puzzling, and shows how they are connected.