I just came back from my local apple store.
I went to replace my white iphone 5 16gig for a new one because it had a light leakage problem.
So, I get a replacement iphone and before I leave the store. I give it a good once over and surprise, there are a few 3mm long scratchs on the back plate. I returned that one as well and the replacement I received for my replacement had a defect on the corner of the back case, where the aluminium and glass connect.
At that point I gave up and agreed with the apple employee that I should just wait a month for a new batch of phones to come and get my phone replaced then.
So, i'm not complaining, I have to wait a month to hopefully get a iphone without manufacturers defects. If the next batch comes in with defects, I'll have to go back to my 4S.
Quality control guy is falling asleep at the helm apple, get it together.