With 13 players under par, the course doesn't appear to be as challenging as USGA predicted. Of course Kaymer is playing exceptional golf and is totally in the zone. It would be nice for him to win -- a long battle back after swing changes, etc. But I hope the course conditions are toughened up a bit.
I think today proved the weather had more to do with the scoring than the course. Pinehurst is a very unique course. The greens are so difficult, it doesn't need high rough to make it difficult. but when the conditions get wet, that neutralized the severity of the greens.