The first rMBP I received had an LG Screen [ A00F / or run the terminal command ] and it had some IR and the whites were somewhat pinkish. I first stopped at a BB close by, and then the Apple store where I [ and a couple of their floor sales people ] confirmed the discrepancy on my screen.
Fortunately, they had a genius appointment opening in the next 30 mins and I took it. The genius, at first declined to see any issues with the tint or IR. However, I showed him the saved IR images which somewhat convinced him.
So, at first he wanted me to leave it for diagnostic [ hardware and software ] which I declined. Then he offered to place an order for replacement which would take 2 weeks and I told him I was within my 14 day return policy and would rather return this for a refund over waiting 2 weeks without a computer and also expressed my disappointed regarding this experience after spending X amount!
He had me wait a couple of minutes, went back in to his back room, and 10 minutes later came out with a brand new ultimate rMBP. He did acknowledge that Apple uses multiple suppliers for the same product and that the major players for the rMBP were LG Philips and Samsung. He, however,could not confirm if the replacement he was giving me was a LG or Samsung.
I opened it right at the store and saw A00E and ran the script thru Terminal too which confirmed it was a Samsung [ LSN xxxx ]
I have to admit the Samsung is a bit brighter and there is no IR to report as of yet!
This should not be an issue for the price tag on the rMBP, but it seems it is unfortunately!!