Buying an iPhone 5S on launch day?

I'm looking to buy the 5S on launch day. Considering that Apple isn't taking pre-orders this time around, if I go to the Apple store on launch day, do you think there will be an iPhone waiting for me there? I do work until 5pm, so that's when my shift is over. I'm wondering if 5pm is already too late.

Go to radio shack. They always have them. I got the 5 on release day, everywhere was sold out, I called them they had like 20 in stock. That was at 6 at night

I wouldn't get it launch day… Give it a few days to let the initial hype die down and let people figure out launch day bugs and such with the device, and then go buy one. If you do want it on launch, then chances are the Apple Store near you is going to be out of devices by 5pm, and I'm pretty sure Apple does weekly shipments unless they're being really smart about this launch.