I've played DNGC a couple of times in strong winds (20 - 30 mph), once from the north and the other from the south. From the second set of tees where I played it both times, it is around 6,800 yards and a stern test. From the tournament tees it is over 7,200 yards, though length is not what provides the challenge. As Jeff mentioned, it is built on some very dramatic land, with large elevation changes. The greens vary considerably in size and shape, and are much more complicated than anything of Fazio's that I have played. I am not a student of the slope system, so my guess is that the high rating is a result of the large elevation changes and some of the forced carries (though these are not out of line when the appropriate tees are played). At some point in time, I will give a fuller detail of the course, but the variety, challenge, and options that it provides are, in my opinion, what sets the course apart. No comparison can be made between Waterwood and DNGC. The latter was designed and built with great attention to detail and sufficient budget; the former has been in financial problem from the first day and rather than improving the course, they've made changes to lower maintenance expenses. DNGC is more "playable" than Ocean for the average guy, in that he shouldn't lose as many balls just off the line of play.
Both DNGC and Austin Golf Club were too new to rate in 2002, but will surely appear in the local list this coming year. AGC appears to be very exclusive, though I may be able to play it next week when I go to Austin to help my son move his stuff from UT for the summer. If they grant me access and the permission to report on the course, I will do so. What I have heard from a couple of people who've played the course (AGC), is that they weren't very impressed, but this appeared to be because of the type of course it is (natural, wild) as opposed to heavily countoured and manicured.