Month and a half wait for a California delivery does not sound like demand constrained:
2017 Investor Roundtable:General DiscussionAn interesting data point here: A friend of mine just ordered a MX 100D, Tesla says the car should be available by end of September. For a 100D, which Tesla prioritizes due to high margins, receiving it about 1.5 months out looks like demand is still very strong for the X.