Exactly my thoughts too.
The only reason I can now think of for Apple not shipping in order is that they've learnt over the years that more people who order a product in the first few hours of launch do so on an impulse basis having been caught up in the hype and end up returning the item, and so it's better for a spread of customers to be given a bit more time to change their minds. However, while I can see this argument having some merit on an iPad launch, it's difficult to see many people impulse buying the nMP! Anyway, I've no data to support this - just a wild guess.
Yeah, I don't know what the method to their madness is, but CONGRATS to the ones that have theirs and maybe we'll have ours shortly !