Ted,
This is an interesting topic. As you know my list of courses seen on the "very best sites" pales in comparison to yours, but let's jump on Ross. I believe I have seen five of his designs. No. 2, Mid-Pines, Southern Pines, Broadmoor, Miami Valley, and I think you have played each as well. No. 2 is an exceptional golf course on an unspectacular piece of land. The majority of the holes are flat, with the only ones with significant elevation change being 4, 5(right to left slope), 13, 14, 16 (slight), 18. Here he has a very high proficiency rating. Mid-Pines and SP are really better sites than No. 2, and he probably matched the course to the site. Broadmoor and Miami Valley are relatively flat, especially the front at Broadmoor. Here I think he also has a good proficiency rating as a lesser architect could have turned both of those courses into 3s where he probably made 6s.
Perhaps you can comment more on his other heralded designs like Seminole and Oak Hill.