This, to me, is the strongest evidence that even with all the money frontier labs are throwing into pushing the boundaries of model training and fine tuning, they still don't actually understand what they're doing & don't have as much control as they want you to believe. If they had any real ability to tune & adjust the model & its output, they would have fixed "LLM voice" by now.

Even if you don't think it's a problem, even if you believe that it's just different than human writing, it seems the majority of "regular" people can tell when something is LLM-written and find it distasteful or unpleasant to read, at best. That alone should be more than enough incentive for frontier labs to train this out of their state-of-the-art models, if only they could. The fact that they haven't suggests that they cannot, despite all the claimed advances in model analysis and "explainability."