iPhone 6 Plus Space Gray 128 GB, pre-ordered in-store on 9/12/2014 at 9:28am. Received shipping confirmation at 12:05pm (during lunch) that it had just shipped out (Shipped On: 09-19-2014), but when I went to UPS to check on tracking number, it said it had already been delivered. So I went to the Sprint store (they didn't call me) and I said I was checking up on my preorder. They called, and sure enough, it was in the store.
So if you did a pre-order at the store and haven't received a call, you might want to stop by and ask them yourself, as they looked pretty swamped and probably won't be calling until close time later today.
You also ordered from a Sprint Store? How did you know your shipping info? did you get a order number? When I pre ordered from the store they wouldn't give any info besides the basic receipt and said they would call when the phone comes in.