After seeing comments on hacker news attempt to call an article from 2015 as generated by an LLM, I have very little faith in commenters having any ability in actually detecting AI written text.
And that's just one particularly egregious case I remember. Posters that are technical writers or use English properly get called bots quite commonly when their post history shows a writing style going back over a decade.
But now that LLMs are causing a language drift in English users our filters of "that's an LLM" will become even more useless.