Beg to differ. They are holding all reservations until store close. If there is enough to cover all reserved phones, some won't show up. My local told me that they absolutely will NOT sell any of the reserved phones to the walk-up line and instead will release them on Friday AM.
That said, some stores will start a list of reservations for the left overs so make sure you ask your local store what they are going to do.
ash =o)