I don't think we should throw this accusation around too freely. Human beings are the ones who “taught language models how to write” in the first place, and they can still write.

I work in marketing professionally, have seen plenty of writers try to pass off GPT as their writing lately. It has a very specific and annoying tone that you catch onto quickly, especially in the same industries/topics.

His writing doesn't sound like that. And I ran it through my favorite detection tools (which do work fairly well) and it sets off no AI alarm bells.

He also misspelled 'losing' as 'loose' which grammatically triggers me 😡 😠 😤 — but isn't very machinelike.

There have been people here who verifiably use GPT, and that's cringe, but I don't think this is one of them.