Yes, I agree with a week economy to have such strong sales is scarry. I think there is a point at which sales will start to ecline because most people that are will to put up 12 to 15K to own the Disney dream have already bought.
I would expect to see sales start to slow and then slowly decline at first and then much quicker. For you MBA types, this is similar to the a product curve (introduction, growth, maturity, decline).
So if:
Intro - OKW
Growth - BWV, BCV, VWL, This may still be SSR
Maturity - Contempory, Eagle Pines
Decline - Polynesian, California Disney, Animal Kingdom (Wishfull Thinking)
And all of our dreams will come true!!