Sorry to post about this in the thread but it’s linked (tenuously ?). I received my new iPad Air yesterday and the first thing I did haven’t read the thread was check for creaking but much to my relief couldn’t recreate it. However, whilst checking for it I noticed that when I press on the right hand side of the rear of the Air, that I can see distortion in the image (a bit like when you put pressure on a LCD screen and it distorts momentarily) on the screen in that are but nothing if I press on the left hand rear area of the iPad.
I think this is probably normal but coming from a brick iPad mini 2, something I haven’t come across till now on a iPad.