The iPad, iPad 2, 3, 4, iPad Air, iPad mini and iPad Mini Retina have passed rapid decompression tests conducted by Garwood Laboratories, Inc. Please see these articles below for further details:
There is also a Decompression Test video available that walks through the EFB hardware qualifications. It shows the Rapid Decompression test process on a 3rd generation iPad.
The above articles should provide sufficient proof that these iPads meet most rapid decompression testing requirements.