You said the the Retina Display is the same as the iPhone 4, but I've read in some reviews that the display is exhibiting less contrast, with blacks being washed out more than the previous iteration. Can you confirm that the display has the same manufacturer or is in any way different SKU/part#?
How do you know that it is Gorilla Glass if Corning does not publicly release which devices are equipped with their glass? Additionally, the product information for the iPhone 4 calls it aluminosilicate glass, but it does not say that it is alkali-aluminosilicate. As you know, there are many applications of aluminosilicate glass other than alkali, including boron-aluminosilicate glass.