Terry is saying that if all the duratec engine failures where due to oil starvation (as originally perceived), the main bearings would fail first due to the fact that the mains are first in line in the oil path and would be starved first and fail first.
However, the Master has only seen con rod bearings fail (running counter to the oil starvation theory). Hence, the bearing failures are due to crank whip, not oil drain back issues.
Fools shall mock but the wicked will mourne.
Gea a DMD.