Re: iPhone 6s Plus in store reservations
Yes it does.
Basically the way the system works is all Apple retail stores have a limited number of devices, all colors, all storage and, (if applicable) carriers.
They are guaranteed to have them on premises by the opening for business on launch day.
When you sign in with your Apple ID to make a reservation, you hold one of these "slots".
This is why if you try to reserve now most if not all of the stores have no slots for the 6S Plus. (greyed out)
If you were lucky enough to have snagged one, you are good to go.
Just arrive on time because if you're very late or a no show, you'll forfeit your reservation.
And there will be someone else glad you did for sure!