I find the whole bending iPhone 5 stuff to be pretty ridiculous. I've had one since release (pre-order) and it has not bent at all... not even in the slightest. I've been treating it just like the iPhones before it.
The impression I've got: a minority of users have exerted a more-than-normal amount of pressure on their iPhones (which they think is acceptable), resulting in the devices bending. For example, they might have put the phone in their back pocket (a very stupid thing to do) and sat on it, and they're not admitting it.
Seriously, the iPhone 5 has by far the best build quality of any phone I've ever experienced (and trust me, I've owned or handled my fair share of smartphones) and the concept of somehow bending the device seems utterly bizarre to me, under normal use, of course.
Obviously, aluminium can bend! But it's not like beer can thickness or aluminium quality that we're dealing with here.