To me it seems like people are having different conversations that are inter-related, but ask distinct questions:
Do Mario/Mirabal more often than not produce very good to excellent OL units? Yes.
Do Mario/Mirabal more often than not recruit stud/blue-chip OL? Some years absolutely, some years no.
Do Mario/Mirabal sometimes miss on some of these OL recruits? Yes, but so does every coach.
Do Mario/Mirabal hit on non-blue-chip recruits at a better rate than other staffs? Unclear. I'd love to see some stats on this, but I'd imagine compiling it would be a pain. Might be a good task for
@CIS Al Bot ...