First of all, awesome post. Haven't we really established that the run rate is 550/wk now? 23,000 seems like its in the bag. I get your logic of them not wanting to over commit, so they may actually not raise guidance.
Yep I agree 23k deliveries in 2013 is very doable (barring any unforeseen production or supply issues). Maybe 24,000. But if I was Tesla management, I would give guidance that I could confidently beat... thus 22,000 guidance for 2013. If I thought I could deliver 24,000 confidently, I might raise guidance to 23,000. But that would be a huge sign of confidence from Tesla.