Most likely everyone who pre-ordered will change to "shipped" but it wont actually go out until mid next week.
Verizon has probably over 2 million pre-orders. They're going to have to box them up, print out labels, setup shipping, etc, and then get them all out in time for delivery on or just prior to the 10th.
That means they have to pre-print the FedEx labels en masse. So when yours changes to Shipped it's most likely because they've boxed your order, applied the FedEx label, and it's now in the dock(s) awaiting shipping on X date since as far as their system is concerned the moment that label is scanned it's shipped.
It'd be nice to be quicker but I wouldn't count on it TBH.
Correct me if I'm wrong, but I think it is illegal to charge BEFORE shipping
I believe the orders that have been charged and stating shipped, will receive their tracking numbers BY tomorrow. but what do I know