Yes sadly i was so eager to get some of the new Apple Shiny, that I managed to get one of the very first units that arrived at my local Apple store.
Because it was part of the very first batch, it came with the (you guessed it) LG screen. <SIGH>
But wait....... I have no IR issues, no stuck pixels, no hinge issues no lag... It's an outstanding computer, the best I've owned.
Given how it's just only in the last few days that Apple has been able to keep up with demand, I'm almost certain that my experience is what the vast majority have had.
As many have stated this forum is a magnet for the OCD crowd. However I'm not completely dismissing some of those that have had issues. As with any mass produced device you will have the occasional defect.
And even here, it seems that Apple has been responsive to those that have had issues and have quickly fixed/replaced the systems.
I do wonder about those that have "had to " exchange their computers 4 plus times. If there really is widespread issues with these systems, I wonder why those affected put up with it. It calls to mind the old expression, "fool me once, shame on you, fool me twice, shame on me"