Geez,
Do you guys all read Pat's posts with excitement if you find ways to take shot at him or laugh at the premise?
I do not think he is talking ultra literal as in we know they could not have a tournament a day after a member guest. I believe his point is that Shinnecock presents a fair, and stern test. They will alter the course for the US Open, but may not have to. The greens, and wind present challenges from all distances, yet the width of the fairways and many greens open in the front make it playable for all levels.
I am not sure if it is the only course that can pull this off, but I think Pat is right, the course presents a stern challenge to the player looking to play around par, but allows a lesser player to get around and enjoy themselves.