I mean the guy was writing a paper every 2-3d without AI and got it down to 1d with AI. It seems completely reasonable to me that better tooling could get their time down 50% (try shoveling a driveway vs using a truck ...).

If his was just (ab)using chatgpt to create the papers from thin air then it'd be pretty easy for somebody to show where the pre-chatgpt papers are and the post-chatgpt papers are by the drop in quality. However, nobody has been citing the content of his papers when they make the claims about quality so I doubt chatgpt has an impact on the quality of his papers.

He was “publishing” every 37h, it seems to be mostly by co-signing papers