Matt -
I am not sure of the climate where you were, but it is not uncommon to find some courses in Northern California, outside of the immediate San Fran Bay Area, that play much softer in the summer than they do in the winter, especially early in the day.
Courses in the Central Valley can often receive no rainfall from mid-April till mid-October. They can often go for stretches of 5 or 10 days where the temperature will exceed 90F each day. Course superintendent have little choice but to saturate the course with water each night to keep it from burning out. This can result in some very soggy conditions each morning.
If the climate where you were is similar, that might explain why.
DT