Ask HN: Are "% improvement" stats in resumes an AI indicator?

I've been reviewing a lot of resumes lately, and most of them include very detailed statistics in the previous employment sections: "improved performance by 30%", "reduced memory usage by 55.3%". I counted 14 such statistics in a recent resume, for instance.

I swear I didn't see this kind of thing the last time I was reading resumes. Is this something LLMs tend to do when writing a resume, or has everyone been keeping extremely detailed performance metrics for the last 10 years and I've missed it?