More (not so) fun facts:
54% of American adults read below a 6th grade level.
21% read below a 5th grade level, which is considered functionally illiterate.
High immigration numbers don’t fully explain it either, as first gen immigrants only make up about 1/3 of those with low literacy.
Statistics says yes: https://runninglevel.com/running-times/1-mile-times
Long numbers short: You have to be in the top 20% to be able to run a 6-minute mile, if you somewhat regularly run.