Actually he's right, Normally UPS Worldwide Express has a standard commitment time of 10:30 or noon, HOWEVER.....
The World Ease contract rate Apple worked out with UPS for this massive shipment has an exception to the delivery commitment time and is By End of Day, regardless of the Express Tag, I confirmed this with the UPS Account Specialist we use at work that manages our UPS contracts for large shipments and deliveries ( I work for a Fortune 500 Company ). He looked up the deal Apple has made with UPS and indeed the commitment time was waived and changed to End of Day(presumably to aide in delivering such a large amount of phones in one day). Remember, with such a large contract there is some flexibility in changing and special rules for the sender that you wouldn't normally see sending 1 box express.