The typical New Yorker article is CEFRL C2 [1] or ILR 3/3+ [2]. Most internet comments are at CEFRL A2 or so, with some (often faulty) more thoughtful responses at B1 or B2.
Said another way, your median high schooler can read and understand a typical internet comment, but the median high school student cannot read and comprehend a typical New Yorker article.
There are three aspects of writing in the New Yorker that elevates the level:
1. Vocabulary level. Often this is used to add color, and it typically does so well.
2. Complex structure at passage level with appropriate cohesive devices. This loses a lot of people, but makes the article linguistically rich.
3. There can be a great deal of inference and/or tone in New Yorker articles that some folks just don’t get. It will sometimes cause less proficient readers to take away substantial misunderstandings about the contents of the article.
If you try to talk about a New Yorker article in detail with most people, it is not that tough to reach linguistic breakdown.
[1] https://en.m.wikipedia.org/wiki/Common_European_Framework_of...