I don't know about Claude specifically, but I think people are starting to internalize a sense of when prose reads as having "AI-smell" and I do agree phrases like "Same driver, same track. The LLM is the star." trigger it for me too. That said, that doesn't mean a ton about the whole thing - could be anything from humans starting to echo AI style to someone writing "give my results a headline summary" to an AI to someone saying "here's the data, write an article."
AI is trained on human data. And high quality human data at it's best.
Can we assume everything we think as AI - must have had a high-quality human pattern behind it, and there is no way to 100% prove which is which - unless the author shows a screencast of them typing the artice?
This is not healthy. The right thing to do is – if someone doesn't like an article, they should ignore it – they shouldn't so confidently brand it AI without any proof at all, just because it fits their mood and style.