Clyde -
That's a good question. Based on MacK's detailed green plans, it appears that certainly the basics of the green complexes he drew were actually built. As for some of the details of the mounding and countouring it's hard to say. Even given the pretty decent photographic record. My guess is that they were reasonably close.
One of the things that jumps out - at least based on the current greens - is that the wild contouring on the current 5th and 14th greens might not have been so wild relative to the other greens under MacK's original green plan.
For example, the 6th is mildly funky now, but in MacK's plan it was waaay funky, with an extended, thin tongue right front. Based on photos in Byrdy's book, something pretty close to MacK's 6th was built.
Also note the accuracy of the Nelson/Finger/Spann restoration of the 8th. It is spot on, based on MacK's drawings.
Bob