Not to pile on, but I think you are underestimating just how fast 4.53 is. Way fewer than the 5% you attribute to D1 power 5 run that fast.
I'd say that him being clocked at 4.53 is probably more of an accurate depiction, compared to the embellished 4.4 / 4.3 times we always see reported. Meanwhile, those times would be amongst the fastest at the NFL combine, but those numbers get thrown out with regularity with recruits. I'd venture to say that the vast majority of guys with elite speed capabilities run a tick slower than their reported times -- in other words, right on par with what Erv was clocked at. He's plenty fast, just not Qadry Ismail. Few are.