Elon just announced on the earnings call that Model X is sold out for 2015. New orders will deliver in early 2016.
To me it depends a little bit on how the stock is going to react to this (as this will pay for my Tesla). I am disappointed about another delay even though I agree they should get it right before producing a larger number of Model X cars. However, I am starting to think about a Model S again (if I can get a non p85d with the new seats in whatever color I want).
This suggests that deliveries won't begin until we are at least a few to several months into 2015. What was the original Sig X delivery window? Whoops, just saw this thread: Model X Delayed until Q3 2015 Yeah, we're in for a serious delay here folks.
I am going to bet they will not be mass producing these in 2015 at all. For Christ's sake, they haven't even shown the final car yet. It's been 3 years already since they revealed it.