Beyond the OP's AI-written or AI assisted distinction, I'm also noticing people mimicking LLM's speech patterns. I've read blogs from people who I'm quite sure are above pasting AI output directly into their words who nevertheless are sounding more and more like AI as the sum of all their conversations with Claude begins to rub off on them (myself included, probably)

https://arxiv.org/abs/2409.01754

Skullface from MGS5 predicted this. Hideo Kojima sends his regards.

I think this is just a sign that AI is now participating in the normal evolution of language over time. Language has always been about imitating... someone or some group comes up with a word/phrase/saying and uses it, other people hear/read it, and if they like it and/or find it useful, they incorporate it into their lexicon. This process is constant, and words and phrases are tweaked and morphed over the years as trends come and go.

Now, AI is participating in that process. It reads human words, and some of those words end up getting used more based on the algorithm, and then people read those words and copy some of them. This will feed back in to the AI as it ingests more content, and the feedback cycle is complete.

I have noticed that sometimes in lists I have had the "The ... Solution: ..." sort of repetition. It is probably pre-existing but now that LLMs overuse it I actually am trying to adapt my speech patterns to not, because patterns LLMs overuse quickly become very grating to me.

I caught myself saying "push back" the other day. I've never said it before, it's a Claude-ism.

I suppose it stands to reason: LLMs were trained on human writing, and overuse certain tropes and patterns because those patterns are commonly represented in human writing. But many people aren't particularly adept writers, and they're going to turn to AI to either do their writing or inform how they write. The trope ends up reinforcing itself as people just start to think that AI output is just what normal writing looks like.