I'm not trying to be recalcitrant, rather I am genuinly curious. The reason I ask is that no one talks like a LLM, but LLMs do talk like someone. LLMs learned to mimic human speech patterns, and some unlucky soul(s) out there have had their voice stolen. Earlier versions of LLMs of LLMs that more closely followed the pattern and structure of a wikipedia entry were mimicking a style that that was based of someone elses style and given some wiki users had prolific levels of contributions, much of their naturally generated text would register as highly likely to be "AI" via those bullshit ai detector tools.
So, given what we know of LLMs (transformers at least) at this stage it seems more likely to me that current speech patterns again are mimicry of someones style rather than an organically grown/developed thing that is personal to the LLM.
And so at this point the excessive bullet points and similar filler trash is also just an expression of whatever stupid people think they prefer.
Maybe I'm being too harsh and it's not the raters are stupid in this constellation, rather it's the ones thinking you could improve the LLM by asking them to make a few very thin judgements.