Honestly, for paying $749+ (or $299+) I'd be annoyed if my phone has any rocking (face down) and bend at all. I would take it to Apple to get it replaced now VS later since later on, there's a higher chance that Apple will refuse the replacement citing "damage caused by user". In my opinion the Apple apologists recommended to "just put a case on it" or "it's no biggie, just deal with it" are ridiculous. This isn't some cheapo phone we're talking about, basic physical defects like this should not be tolerated IMHO.