That's absolute nonsense.
We know for a stone-cold fact that they still have an LR reservations backlog in Europe. We also know that the ships which went to Europe *weren't full of 100% Tesla cars*. Therefore there was demand, and there was delivery capacity, and.... they didn't produce the cars to ship to Europe.
That is a production problem. Not a demand problem.
If you want to say that there was a "US demand reduction", sure, whatever, that's due to the tax credit expiration, and I already figured that US LR demand had been saturated back in Q4. But if they can't meet European demand, which they can't, that's a production problem. (I suppose it could also be a delivery problem landside in Europe. Shortage of Euro-spec parts was actually mentioned, though, so... production problem.)
Are you seriously contending that they were able to meet and exceed European demand (with backlog still remaining!!!) and decided not to, for shits and giggles? That doesn't pass the laugh test. Slowing down the production line intentionally makes no sense: most of the costs are fixed (hourly workers, etc.), with materials being the only variable costs really. They want that line running at top speed, and it wasn't. If there were really a total demand shortage, they would have laid off a shift, like they did for Model S and X.
You really think a mere 20K to Europe is due to demand? I mean, are you kidding me? If they could have produced more, they would definitely have delivered more. Something prevented them.
We essentially have incontrovertible proof of a production problem. Had Tesla been able to get to full speed on European and Chinese production during early January and ship the cars out promptly during January and Feburary, they would have delivered more cars in Europe and China. They were unable to.
The only reason to cut back to 63K production is that they were unable to produce more Euro-spec and China-spec cars. They have a production limitation.