The post was definitely not AI sourced; underlying thoughts are original and possibly it’s been touched up afterwards. But this is 100% the style of ChatGPT, I would bet a lot on it.
It wasn’t an accusation (I don’t think it actually matters in the end), so much as to understand why do it — in a post about ChatGPT usage, it helps understand context: if OP values using it for stuff I wouldn’t value using it for, for example, then it will change the variables.
Ha, I also got that feeling. It's the weird lists with a summary fragment after the bullet. ChatGPT loves framing arguments like this but I almost never see people actually write this way naturally except in, like, listicles and other spam adjacent writings.
I know of a few people who had their style of writing being similar to ChatGPT before ChatGPT was a thing. This could be a case here too, keep that in mind.
(also sucks for non-native speakers or even speakers of other dialects, like delve - apparently it is a common word for Nigerian English)