I'll be honest, I only read this article to make sure I was literate. Can report, I am one of the smarty pants who can read Bleak House. this system of measuring literacy by levels 1-5 seems most common in Britain, and the test was done on Americans at two Kansas universities. The Dicken's passages seem to contain some culturally specific clues, though would the results be an different if they used Melville instead of Dickens? Maybe not.

Level 5 Literacy is basically the same, but across multiple sources at once while being critical: "Adults can search for, and integrate, information across multiple, dense texts; construct syntheses of similar and contrasting ideas or points of view; or evaluate evidence based arguments. Adults understand subtle, rhetorical cues and can make high-level inferences or use specialised background knowledge."

I expect this competency to be demonstrated by a graduate with a Bachelor degree, this sort of literacy is equally important in STEM. I think my friends when I studied Engineering could do it, but I was friends with strivers, and I met a lot of idiots in random assigned group projects, and they graduated in the same class as me.