Great pictures posted by Sven. Jason describes some of the differences between the greens, as shown in those pictures, and today's greens. Indicates those two 1938 greens were changed. It would be great to know when, why, and by whom, in order to have a better understanding of the evolution of Pinehurst #2. But, seems to me that the bottom-line question being addressed in this thread is: Can the current Pinehurst #2 greens legitimately be considered Ross greens?
Coming back to Ed's original question, Pete Dye opined on #2's greens in his Foreword to Brad Klein's excellent
Discovering Donald Ross. Here's what Dye said:
About that No. 2 course. Those greens with the crowns? I'm sorry to say it but they're not what you'd call part of Mr. Ross's style. Go down the road to Mid Pines and Pine Needles, for example, where Mr. Ross built the greens himself, and you'll see more features than just crowns. That's what I think is so great about his work - that he changed what he was doing...
... At Pinehurst No. 2, however, those crowned greens are not really what he did anywhere else. This is because they've been top-dressed so much that they now look like perched-up angel cakes. That's what happened with common bermuda grass in those days. The only way to keep healthy turf on them was by top-dressing with lots of sand. Richard Tufts, who ran that place for many years, told my wife Alice and me that Pinehurst always put a lot more money into its greens - especially on the No. 2 course. They were top-dressed more often than at other courses and the result was that they changed over the years as they became built up from the additional sand. So they're quite different today from what Ross had planned. The slopes on the greens, and the way they fall off around the edges, are probably a lot more severe than he intendedA photo accompanying the text shows a photo of the 6th green from the Tufts Archives, and it's very clear in the photo that the signature fronting slope of the current 6th hole was not present in its early days. This is a scanned copy, but even with the degradation from scanning you can still see clearly the grade-level entrance to the green:
This is, of course, consistent with Sven's photos from earlier in this thread, showing the second and fourth greens. A quick look at the feet of the spectators in those photos shows that the front of those greens were at grade-level or even slightly below the fairway grade, as is the right side of the second green and both sides of the fourth. The present day greens are notably more elevated from their surroundings, particularly on the front and right side of 2 and the left side of 4.
Which all returns to the question of how the greens at Pinehurst became so much more pronouncedly crowned than the greens of other courses through top-dressing. The answer has three parts, as far as I can tell:
1. Pinehurst had common bermuda greens that required extensive topdressing. As Pete Lavallee noted, this topdressing was done without aeration until the 1960s. In contrast to other courses where aerification done in conjunction with topdressing helped to remove some matter to offset the matter added in the topdressing process, Pinehurst did not aerate their greens and thus the sand added gradually caused them to rise.
2. Unlike other courses that may have topdressed their common bermuda without aerating, Pinehurst had plenty of money to carry out extensive topdressing, as stated by Richard Tufts. Thus, their greens became crowned more pronouncedly than those of other courses.
3. Finally, there are a few potential contributing factors that are harder to pin down but that may well have also played a role. As noted by "The Lurker," Diamondhead had the green surroundings bulldozed which may have incidentally also caused a shift in the location of the crowned areas. Likewise, incorrect measurements during one of the several green reconstructions undergone at Pinehurst may also have resulted in exaggerated slopes.
Coming back to Ed's question, I do not think we can consider the greens at No. 2 today to be Ross greens. It's clear that they've shifted dramatically from their original design. However, I'm also not sure that there is enough documentation of their original design to ever inform a legitimate restoration or to really understand the nuances of how Ross intended his original greens to play. And while broadcasters who talk about "These classic Donald Ross turtle-backed greens" are a bit misinformed, I still find the current set to fit the holes quite well in my time playing and observing the course, and their unique evolution has created a very special set of putting surfaces.