I ordered at 5pm pacific time (in store). I don't think anyone has anything to worry about if you ordered on the 15th.
Dude, I'm still weirded out right now, i ordered 2 iphones (16gb and 32gb) around 7:50pm PST in store also and here is my status:
First thing at the store, i order the 32gb for me

And STILL in process!
Then i ordered the 16gb for my sister BUT this shows to be shipped first!

Then i got this a second ago about the 16gb, i dont know if its the confirmation email or what

I dont care about my sister's phone! Where is mine!