Not that I needed to run the test, but mine is a 2.8/16GB/768GB rMBP, looks absolutely amazing does this display, but just for fun following the discussion, my MBP has an LG screen.
I do not have any issues what so ever. The display is gorgeous, nothing wrong with it, no dead pixels.. no complaints...
If I did not know about this forum, I would be none the wiser. Then again, from reading on here, sounds like people jump at the chance to get a Samsung display and keep taking screens back until they hit the so called screen jackpot, so whilst they do not get IR, they do however complain about yellowing...
If it looks good, keep it, you shouldn't be looking for manufacturer details and THEN making an decision to keep it or not.
Mine? LG. Issues? None. Was there any need to check? No.