Only that’s not a compliment at all. It’s a comparison based on the premise that “autistic” is an insult. A stigma. Or at least a bad thing. Because the only reason someone thinks of me as “high-functioning” is by holding me up to someone who is no more or less autistic—just more obviously challenged—and deciding that they are “lower-functioning.” Really, it’s no different than saying, “Oh! Well, good for you. You’re not too ugly. That gal over there? She’s royally ugly.” Lack of understanding tied up with a bow of condescension.