Head porting, to me is like quantum mechanics or dark matter theory. I wouldn't even think of trying to understand it all. Maybe you're right, maybe not. But time and MPH do not lie.
I certainly have no reason to doubt the guy. Maybe he wrote the wrong numbers down?
After a full summer with those heads, I really don't care about the flow numbers. I just know they are a DRASTIC improvement over the TF's or the original hand port job. So I'm happy.........
for now.