you'll be surprised. I went to one apple store just to return some headphone on the 23rd. Asked if they had any iphones, the lady said we are filling priorities first but call back sunday. I left called some other apple stores, picked one up same day! Went in and left in 25 mins no pre-reserve!!!
yesterday one store i called only had stock for the priority list (los cerritos mall) and was going to start taking walk-ins monday. other store i went to (brea mall) had stock for both priority list and walk-ins, but walk-ins were limited to 16 gb models.