My phone conversation was a long one. It probably took 45 minutes to an hour and involved a lot of transferring and repeating of my serial number .
I called the generic 1800-APL-CARE number first, explained that I was in the Apple Store and that I was having LG panel IR issues. They suggested the usual "repair disk permissions" and "reset the SMC" to try and fix it but that's not going to fix anything. Call was escalated to her supervisor, who offered me two choices:
1.) Let the Apple Store take in my rMBP and run test on it to send to their engineers and replace the screen
2.) Transfer me to Sales Support and set up a replacement rMBP.
Of course I chose option 2, as Apple can run tests on it in their own time when I send it back. He could not get through to Sale Support (something was "down" and couldn't transfer me) so he transferred me to CPU sales. I don't know what the difference is, but the wait time was probably 20 minutes while he tried to get through to someone.
The CPU Sales guy said he couldn't do anything, and that he would have to transfer me to tech support, which was where I started. I asked instead to be transferred to customer service, where a gentleman was finally able to offer some real assistance.
The Customer Service rep had read my case notes and had set up a return label and said I could expect a refund ~5 days after they received the rMBP. I told him I didn't want a refund, I just wanted an exchange, at which point he set that up instead and said I should ship my rMBP back as soon as possible. I asked him if I could hold onto it until the replacement arrived, and he said that would be fine. According to the updated web order page, I now have until August 16 to send the faulty rMBP back to Apple.
As frustrating as this situation is, I'm not really irate about it. I've never yelled or swore at any Apple Store employee or AppleCare/Customer Service Agent. Those folks already understand that people with rMBPs and faulty displays are upset, and taking out frustration on them doesn't help anyone. I've never had a bad experience with Apple Service and Support, be it in store or through the customer service people. I once had a 13" MBP swapped out for a newer model because of three botched repairs to the old one. In my experience, Apple seems to always come through in the end. It may just take longer than I'd initially like.