The shipping method you use should say. For me, I chose the release day shipping option. Do you not have that?
I'm from Australia so only options I have available is AmazonGlobal Standard, Expedited and Priority.
I got a free upgrade to Priority (it takes 2-5 business days) because I asked via live chat was there any way for me to receive it on the release date.
I'm guessing release day shipping is only available in certain countries and not Australia.
A few extra days means more opportunity for spoilers to randomly pop up D:
Some people got spoiled on YouTube cuz some a-holes are using spoiler pics as their thumbnail.