I agree that the average isn't 15k but I think it is more than 4000. Look at how many teams ride pinarellos. The Dogma retails at 16K. Now imagine a custom built dogma frame with a pair of zip 404s. You could easily be pushing 20k. Now that is on the high end. But even the 5900 that usps rides is well over 5k with good, but notthing special for wheels, and I would say that is towards the low end of the scale. I would say you are probably looking at 6-8k for an average with all the perks. (This is for the euro peleton) The US peleton is probably around 5k.
-Matt-