You make out of it whatever you want. I would say that if writing matters to you, developing one’s own style is more important than ever. In blind pairwise evaluations by 159 representative expert (MFA-trainedwriters from top U.S. writing programs) and lay readers (recruited viaProlific), AI-generated text from in-context prompting was stronglydisfavored by experts for both stylistic fidelity (odds ratio [OR]=0.16,p < 10^-8) and writing quality (OR=0.13, p< 10^-7) but showedmixed results with lay readers. However, fine-tuning ChatGPT onindividual author’s complete works completely reversed these findings:experts now favored AI-generated text for stylistic fidelity (OR=8.16, p< 10^-13) and writing quality (OR=1.87, p=0.010), with lay readersshowing similar shifts. […] The fine-tuned outputs were rarely flagged as AI-generated (3% rate versus 97% for incontext prompting) by state-of-the-art AI detectors.