bonnie
I play a nice person on twitter.
Why 2 months? There is no backlog of manufacturing the X. There is a big line of X orders, but they can start building X's the day they open the design studio. Supposedly the new line at the factory can do both X and S on it at once. So really they can start building them the moment someone finalizes their order. The order of X vin numbers does not correlate exactly to the order they roll off the line.
I said before the first X's off the line will be inventory vehicles. Probably a weeks worth of production, 500 or so to spread out to stores and for test drives. Then the big "unveil" and the founders series will start rolling off the line. Those first 500 inventory cars will probably also be considered a full blown production test to iron out any remaining issues from the manufacturing process.
Edit: This makes me wonder if getting an inventory X will be as easy as it is getting a inventory S. Jump to the front of the line and get your X months before people who pre-ordered in 2013-14?
i doubt we'll see any inventory cars in stores until early 2016, after the first 5000 or so have been delivered. Before that, I'm sure most reservation holders will get a test drive at a drive event, just like with the Model S.