Patrick:
More of this discussion than you realize is about construction and maintenance, as much or more as it is about design.
For example, Hidden Creek's designer, Mr. Coore, likes to build "push up" greens by importing a foot of good sandy material and shaping from that. So, if he's got a non-sandy site, he'll have to do a lot more shaping work if he wants the green fronts to blend in at grade. He's usually starting with that one-foot rise. Sand Hills and Friars Head (the holes in the dunes) are the rare examples where he didn't do that, because on those two courses he just used the sand on the green site. Coincidentally (?) they are considered his two finest works.
JES' example of Huntingdon Valley is also interesting -- if those greens have been aggressively sand topdressed over the past 30 years, like greens on most of the high-end private clubs in the northeast, then the front of the green would have been raised 3-4 inches JUST FROM THE TOPDRESSING. So the rise he likes so much may not have been there when the course opened, unless they have been topdressing the approaches just as heavily. I hope he will go find the old plan and comment on this specific example.