Every morning a job engine I built reads the company job boards of thousands of US employers, the same engine behind FirstRung. Since October 3 it has also kept a research record of every business posting it reads: the title, the location, the pay range, and the experience floor its rules find in the full description, with the sentence that set it.
This edition uses 11,579 US postings from Greenhouse, Lever and Ashby boards, whose listings carry the full description, gathered over 18 daily sweeps. They collapse to 8,189 distinct roles at 2,109 companies. The definitions, the headline and the chapters were fixed on October 3 before any of this data existed; what changed since is listed, dated, at the end of the method.
Two checks travel with the headline. Counting every company once instead of every role gives 30.8%. Removing 13 titles where the early-career word names the work rather than the level, such as a university recruiter, gives 31.3%.
The floors are read by rules, not by a person. How often those rules read a description correctly will be checked against hand labels, and that figure will appear here once it exists.