The main point of the article, though, seems to be that sometimes the WCAG2 level requirements (A, AA, AAA) are a bit strange. He gives an example of what's needed to conform to level AAA with headings, and then for just A (the lowest). For example, breaking up a 5000-word essay with properly marked-up headings with unrelated words (such as <h1>jibber-jabber</h1> and <h2>heading!</h2>) will count as satisfying level A conformance. It's only up at level AA that the headings actually have to have meaning. That is lawlz.
But anyway, a fun read. Enjoy.