The author of this Yahoo! News article is either complicit in the perpetual dumbing-down of the U.S., or he's just dumb himself, and doesn't know the word sic would've been appropriate here:

It's your language. You use it every day. You should strive to master it. My late mother, a 27-year, graduate-level professor of English, embedded that in my brain once upon a time. I’m not nearly as smart as she was, but I’m sharp enough to recognize that the vast majority of native-born Americans can’t speak or write English worth a lick.