I went and pre-ordered mines yesterday. I'm not sure if Gamestop is saying this worldwide, but the one that I went to guaranteed me that I'll have my PS4 day one.
I would've reserved another one knowing that if the cashier didn't start trolling making me lose my train of thought.
Cashier: "Would you like to reserve any games?"
Me: "Yeah, I'll take NBA 2K14."
Cashier: "You sure you don't want NBA Live 14"

?
Me: "Absolutely not"

.........
*Hands her the funds and waits for receipt*
Cashier: "Okay, you've reserved the PS4 and NBA Live 14. Here's your receipt and change. Thank you!"
Me: 
.............
Cashier: "J/K"
Now Populair don't normally strike females, but she was within seconds from catching this fade if she didn't hurry up and hit me with the "J/K." Like I said, I momentarily lost my train of thought, but I'll double back and cop another one tomorrow for the flip.