I've found that AI-written text consistently fails to comprehend the context. It either assumes there's little context available, so it writes too much, or it assumes the reader has all the context, so it writes too little. Human-written text has those problems far less often.

I hope the LLM builders are paying attention and they add some kind of step in the process that causes the system to reflect on its assumptions about context and work to refine its understanding of the context before generating output.