Dan Riccio, Apple’s vice president of hardware engineering:
Relative to the issue you referenced regarding the new iPad Pro, its unibody design meets or exceeds all of Apple’s high quality standards of design and precision manufacturing. We’ve carefully engineered it and every part of the manufacturing process is precisely measured and controlled.
This iPad Pro bend is a real head scratcher for me. Apple is so diligent and precise in every aspect of manufacturing that it seems impossible that this could happen, but yet it has. I haven’t seen this with my iPad Pro and we don’t know how prevalent it is beyond the few pictures we’ve seen online.