The plus is a largo phone. It's simple physics.
And the dude in the video, really cranked, using all his might.
If he did that with a competitor of similar size, you may see a plastic crack.
I still think the symmetrical glass back of the 4 and 4s was the best phone design ever. From a looks AND durability standpoint.
I keep all my iPhone's. Had every major model with exception of the 3G. And the 4 still shows zero signs of wear and tear.
Hopefully they return to the...