> It was also a very low initial production volume to begin with. So doubling isn't because it is doing above everyone's expectations, it is because Apple underestimated the demand. That is also ignoring the summer back to school season.

Doesn't that mean precisely that the sales are above Apple's expectations which is everyone in all that matters here.

Well yes. But it is also a mistake that should have avoided and Apple are usually better than this. This suggest they have under estimated for one reason or another.

My guess is that they were extra cautious in case of a flop just before new CEO was appointed.