I also had another thought about the problem itself: Most of us get this mura problem on the lower part of the display, a region where there is much heat very close to the screen as you can see here http://www.gizmodo.com.au/2012/06/watch-the-retina-display-macbook-pro-heat-up-u nder-thermal-imaging/.
Another source states that LCD Mura damage gets more likely when much heat is applied to displays.
So especially, when you do something that induces your mbp to produce much heat and then immediately close it, the lcd will get broiled especially in those areas where the metal of the body is so close to the screen as it is the case down there.
What if we are not facing a heat accumulation issue (rather than a screen problem) that is caused by the design of the mbp in combination with the heat sensitive retina lcd's.
If apple had recognized this, what else should they do, than to state this was a problem caused by the user? Otherwise they would have to replace the screen every couple of weeks for many users (just fixing the symptoms), or they had to replace the whole mbp with one that has a completely new design (and does not exist yet). Blaming the user will be much cheaper - at least in a short term view.