a bit worried about this, my 6+ is to be delivered today.
however, following reports that every phone bends, I looked at my old iPhone 4S that I am using for now, sure that it would be perfectly straight; and just noticed that it was indeed bent! mmm....
also, I sold my 5S a few days ago; I would never have thought it could be bent; but now that I think about it, after 6 months of use, I had to return my Apple case as the left corner of the case would pop up by itself all the time. I got a replacement case, and that case started having the same problem after a few hours of use.
Although I never thought about it then, now sounds like it may also have been bent.
Well hopefully if it does bend, it won't be to the extend of what we see in these videos, and hopefully I won't be tempted to verify that every 5 min.