The interesting about the tees at Chambers Bay were that the only sloping tees were those which were big ribbons which extended out to the fairway.
Along with 2, 6, and 16, there were also other holes with slightly sloped teeing grounds. 1, 3, 7, 10, 13, and 18 all had some type of slope on the tees.
However, the holes which had several tee boxes, that were not really ribbons of fairway, were the holes without sloped teeing grounds. 5, 9, 14, and 17 had almost no slope on their tee boxes.
Its quite intruiging.