This! Well, kind of!
I definitely do some type of screening for pieces that I read: I may look up who the author is or what they've worked on; the piece may have been recommended by someone else I respect on social media; the topic itself may have little other writing on it online which signals that it may contain original thought, it may have been up-voted on HN and had interesting comments, etc.
That is to say, I try to evaluate whether it's worth my time reading the article in full, even as I start reading it. I do have a habit of saving URLs of things I read, and typically jot down a few personal notes in a local .md as I read along.
I do use LLM writing as a negative signal: it could be that the author hasn't spent that much time thinking about the issue, and I can spend that time reading something else from my reading list. But there's definitely been a few cases where I read pieces in full, even though they were clearly heavily LLM assisted, only because the material just seemed worth tanking through for.
Perhaps, rephrased: I seldom drop pieces because of the prose, more often I do so because it lacks substance. And, to add, it could entirely be my selective process that leads me to dropping articles less!