I think the stats he is referring to isWith all due respect, I have no idea what stats you are referring to but stats are meaningless with regards to a running backing handling pass protection. There is no way to account for scheme or assignment. Watch Moreno pick up a blitz and watch Miller. If that doesn't convince you then we'll just have to disagree.
Moreno only gave up 1 sack, 3 hits and 3 hurries on 80 pass blocks with Peyton. Miller gave up 2 sacks, 1 hit, and 4 hurries on 127 pass blocks with Tannehill.
Both players had 7 negative plays in pass protection but Miller did it in over 50% more protection plays.