I have not really heard anything about its issues, however the online shop i preordered the screen at says they would get it in stock at around the 28 juli, and recieved a email that it would first be delivered to the store the 30 juli so 2 days extra. and + a little extra waiting time for the screen to be shipped to my door the 3 august or some where around that date.
Can you link some news from where you came across the Child sickness the screen might have, and if supposingly the screen would be later out in the shops?, since I guess, as you mentioned that the screen would be held back before launching for order instead of preorder