I think it's clear that we will witness prep sub-four performances on an annual or semi-annual basis from this point forward.
The bar has been irrevocably raised. Eventually, the 4:20 miler will cede his D1 roster slot to the 4:10 miler; the 4:10 miler will cede his scholarship to the 4:00 miler.
Both mediocrity and excellence will accelerate. Enter the uber-milers.