As soon as I get the feeling that an article was written by a LLM, I stop reading. Usually it's repetitive phrasing, or grade school essay style summaries that turn me off. In short, a poor ratio of text to actual information. Even bad writing can have useful information in it, and I will plow through it. But vapid text that meanders without saying anything isn't worth anyone's time.

On the other hand, if LLM-generated text is actually good, and I can't tell... I guess then I don't care?