Bestbuy already has some reviews up and im pretty sure not a single reviewer owns one or has even touched one. Some are pretty damn funny and date back to 2 weeks ago.
I absolutely hate when stores allow people to review unreleased products. I swear they should have the review section closed until Thursday. It makes the entire review rating useless, especially when you have a bunch of people going there (in support of or against) and reviewing based on their hopes and aspirations.
Proof of ownership should be required, like a code at the bottom of your receipt. Most people would want to post a review from the store/site they bought from anyway.