Let's keep in mind that Tesla has managed to secure over 8000 reservations that no one has gotten to test drive (or see the final version of), and if reserved today would still have to wait over a year to get delivery. They've also done this with
absolutely no traditional advertising whatsoever. There's an interesting story in today's NY Times about how young people don't really love cars the way generations before did.
To Draw Reluctant Young Buyers GM Turns To MTV for Help
I think the Model S is something that young people would really love once they saw and it and understood what it was all about. 95% of the people I talk to (of all ages) about Tesla have never even heard of the company, let alone the Model S. Once it's out in the marketplace and there is no long delay in getting delivery, and assuming it's favorably reviewed by critics and owners, I fully expect they'll be able to sell 20k cars a year with ease.