I think this thread is verification that:
a) display 'quality' is subjective
b) placebo effect is real
I have (as stated earlier) and AU Optronics display. Just lined it up with my friend's 2011 MacBook Pro. The display on my MacBook Air is significantly crisper and defined. That's my best of way of explaining it. We all have different perceptions, and I consider this display to be solid.
I don't think it is subjective as you think. That is, I believe there is consistency among humans eyesight. Then; given these consistent parameters, there does exist (from majority agreement) a "better" display.
We could also take a colorimeter and measure the gamut on these panels. From the images taken alone here, I could about bet that the samsung does have a higher gamut. This of course means that the panel can display more colors, and from that, there are more accurate colors when it comes to what we are capable of seeing ourselves in the real world. I would imagine that anyone right in their mind would prefer to get as much of those colors on a screen - not have them stripped away from their photos, for example. This is again based on my assumption that our eyesight
is consistent. Or more specifically,
that the colors we are capable of viewing is similar. But even with variance among our eyesight, a screen can still look better than another with consistency given just the property that "they", who ever it is, will still perceive more color - if they are capable of seeing it.
Also, when you say crisper, I assume you are referring to pixel density. The Air does have a higher pixel density than the standard Pro screens. But here, I believe we are mainly talking about gamut. At least, a lower gamut would produce the "more washed out" appearance that seems to be the primary discussion.
My AUO screen is not bad, it is just that it angers me a bit to know that getting a slightly better display (by gamut) is a gamble. The default AUO calibration profile that I had, however, was terrible. I believe if the panel factories (or apple) provided better profiles then less would complain, but it definitely does not do much for gamut.