Sounds like its a good thing I was first out at Chambers Bay, Pebble Beach, and Spyglass Hill. Played in 3 hrs, 4 hrs, and 4 hrs 15 minutes respectively. Pebble and Spyglass got paired up, but both groups moved reasonably well.
Spanish Bay, which I played the same day as Spyglass, was 5 hrs 20 minutes to play 16 holes--had to drive the final two holes to see them (what little one could see) before it became pitch black.