I had a sneaking suspicion it would play tougher than we all thought. I have a friend who's actually played Merion along with a few other US open courses, and stated it was probably the toughest he's played.
Outside of Oakmont of course, which is brutal.
One a side note, I may have a chance in a few weeks to make a trip to Tulsa and play Southern Hills. Only problem is, the wife and I are expecting our first mid to late July/Early August. So I'm not sure I'll get to make it.