Jim - I'm a 2, used to be a plus 3 in college before kids, wife, law practice, etc., and I shot 74 or 75. And I had an all-world driving day. In fact, it may have been the best I ever hit the driver. But, I didn't hit 4 of my 13 clubs. And all things being equal, two of them could have been interchangable as I was punching out of "the shit" or laying up.
None of this is intended to be a critique of Merion though....it's just a comment for those who say that Merion is the type of course where one hits all their clubs.....because for me and I suspect others, it certainly isnt.
Pine Valley, yes....Merion, no. And to be clear - I LOVED MERION.