Niall,
I believe that the golf market is driven by word of mouth more than anything else. Most golfers are educated and sophisticated enough to know that a review may be politically or financially motivated. On the other hand, any one of us would rush to play a course if some one we personally know and respect recommends it. This forum is a shining example of exactly that.
Randy,
A quick Google tells me that the Nicklaus design in Chapelco is out there pretty much on its own, with no other golf in a day's drive. If this is the case, then it doesn't matter who designed it, very few people will go out of their way spending airfares, hotels, and so forth to play one single golf course. In the golf tourism industry, there is a critical mass of a minimum of three golf courses in close proximity, i.e., convenient to a single hotel or lodging, to draw the customers. So if a Doak course and then a Coore course did go up side by side in Chapelco, no doubt business would be greatly enhanced on the Nicklaus layout. But the same thing would happen even if the new courses were designed by Jones and Hawtree.