I'm as surprised by this as you are...I wonder how many they allocated to each store, and how many are reserved vs. first-come/first-serve. Whatever they're doing is pretty effective for building hype (and alienating some customers), that's for sure.
Given the way everything has gone today, nothing is a guarantee of course, but I think this is a pretty safe assumption:
No, I would say everyone that has a reservation/confirmation email is safe (for the entire business day Thursday). They're just not allowing anymore reservations and now it's just a game of who camps out earliest among those without reservations.