I find it absolutely ridiculous that there isn't enough supply to cover pre-orders within the first hour of coming online, let alone the first 15 minutes.
The Jet Black I can see being in short supply as it is a new manufacturing process and they may be getting low yields. Pair that with higher demand because new color and it's a recipe for a waiting game. Hence why everyone with that color with the exception of a select few has October delivery dates. The other phones all have the same manufacturing process for the casing so not sure what the hold up is, they could have started producing these months in advance and had a stockpile of them. I'm beginning to think it is more about creating an artificial shortage to create the hype machine apple wants. Let's face it without the hype from shortages to get people lining up I'd say this was a mediocre upgrade that wouldn't have generated a ton of hype on its own.