The term "bricked" should be banned in this forum. I don't even recall the last time I knew of an iPhone that was TRULY bricked.
It actually happened to me when iOS 6 came out. I went to do a fresh restore (phone was jailbroken) before installing it and my phone became a paperweight. Restoring wouldn't work, couldn't dfu, brought it to Apple and they couldn't get it to come on or even show up on their computer.
They ended up swapping it out for a new one even though it was out of warranty though. Apple's customer service is probably my favorite thing about them.