Ha, well this author certainly had her thesis and was looking for supporting facts. But I agree with the quoted people at the universities that think that the levels of undiagnosed anxiety and ADHD outstrips rich-people-cheating by 5:1 or so. Public K-12 has become awful in the US and is most definitely causing anxiety at high rates among students. School is nothing like when we were kids.

TLDR: at Stanford, 38% of undergrads are registered as having a disability. At Brown and Harvard, it's over 20%. At Amherst, it's 34%. Although not all of these students receive testing accommodations, researchers say most do.