Adam - Phil might have done that in the past, particularly when he was at ASU, but I don't think that he's been to DF since before Whisper Rock opened.
I agree with Forrest's summary. To me, this is boiling down to a "manufactured" vs. "natural" discussion. Courses built before the real estate boom here used the land as it was. The courses in town (the Wigwam courses, Biltmore, AZ CC, Phx CC, and I guess Papago) are nice parkland courses that are flat to gently rolling because they are on the Valley floor. Desert Forest was up in the hills and was done on a tight budget, so very little earth was moved. Those are the "natural" courses to me.
Routing courses through real estate developments changed the game. Drama and excitement sold real estate, so every course had to outdo the last in their clubhouse and course(s). Only Estancia and Whisper Rock, I think, have successfully molded the two - but they did it by creating a huge buffer between the homes and the course.
The newer courses also have to challenged with how to bring their maintenance budgets under control. Bunker maintenance and water costs are big for these lush operations, especially those that overseed every year. Desert Forest, Talking Stick, and We-ko-pa are pretty simple to maintain and can use a lot less water.
I'm not sure that I understand the love for Outlaw. The members don't want to play it from all that I hear from DM members and pros. The play count at Outlaw is a fraction of what they get at the other courses. Most of the members I've talked about this with say that the green complexes are too far over the top, too hard for the average player to enjoy themselves. The pros think that the dormant grass is more of the problem.