I mean, not a very surprising result? At work I can almost always immediately see who wrote which lines of code, since we don't enforce code formatting. From what I can gather most authors do have a distinctive writing style as well, which can be detected. Why would LLMs be different?

I feel like this is a fools errand. Let's use the marketing terms to frame this problem. Companies are saying LLMs are like "the new printing press". Should I worry about detecting if something was printed or written by hand? No, I should worry about the volume and contents. That's what matters.

I wonder whether this style is specific to the LLM (Grok vs. ChatGPT) or if it will somehow arise from the raining data itself that they all share and be sort of a permanent "accent" the LLMs have.