Sorry, my brief question was an exaggeration in itself... I couldn't bother to ask it more specifically, as it would've gotten (and did just get below) strenuously more complicated.
I just wanted to know if there's anyone on the forum you were thinking of who's been mentioning that concept besides Spider and Alioth, both of whose ILIhoods aren't of consensus, or of personal certainty. I've only seen those two say Dunning-Kruger (apart from the present company, and naturally myself), and only lately, so, I'm curious as to whether your claim was based on any other forumites.
Well, she says she was born in Armenia -- I'd say it's highly probable that she didn't acquire English "natively". Also, her intonation sounds vaguely unorthodox.
However, I can't offer any insight into the degree of the causal relation between this suppositional situation of ESL and your (admittedly rude to admit) impression.