Every Apple product that just launch will need to go through a series of official stress test, but are always unofficial stress testing on Apple product such as drop test, shoting test, also blend test.
There is a TV program which call “Will It Blend”, they will show you how your Apple iPhone4S, iPhone 4, iPad will look like after blend it with a blender machine.
Apple iPhone4s blender
Apple iPhone 4 blender
Apple iPad blender