Unless it's extremely obvious (e.g. repeating the phrase "In conclusion, [...]"), I honestly just can't tell if something is "AI"-generated or not. Even reading an article pre "AI", it could look like it was produced by ChatGPT.

I've also hired people to write articles for my blog(s). Some of them are clearly AI-generated. Others are "maybe AI-Generated", or "probably AI-Generated with some editing". It is what it is, I guess. The web is changing.