...this is a (sad) fact. One simple example: take an inferior quality T-shirt, put a Versace sticker on it and sell it for 80 $. I witnessed several tourists buying such stuff in the US because "it is so cheap for a Versace". I prefer buying a good quality T-shirt with nothing on it for 10 $.

The Cayenne will sell...at the beginning. But I wonder how much money VW will charge for it's W12 Touareg because this might be a highly interesting product. Not to mention the all new upcoming BMW X5 and Mercedes ML. I suppose Porsche wants to counteract with high power versions of the Cayenne Turbo but I'm not sure this will help. The Cayenne Turbo is already overpriced and paying the same amount of money for a 996 Turbo and a Cayenne Turbo would be ridiculous.
I'm not sure about the Cayenne's success right now, it might sell well in the first and maybe second year of production but afterwards, it might have the same destiny as the 928. Time will tell.