Given how damp it is in San Francisco, especially in the summer time, the sand would be moist and packed down. I wouldn't be surprised if they're not using sand pros to make them play more difficult.
Yes, the course is holding up well in terms of where the leaders are relative to par, but they did have to resort to several setup gimmicks to do it. Fairways narrowed by several yards, long rough, firm bunkers, two converted par 5s, and hole after hole with tucked pins.