That much contact, you'd think you would hear it wouldn't you? Could it be that it's fine at idle and not an issue until the oil pressure builds to pump the lifters up? What do I know.
from what I can tell, the intake valve was almost just scuffing the piston. so maybe that wasn't very noticeable. the exhaust valve looked like it was hitting the piston just at certain times, maybe just at higher EGTs.