I just got a phone call from Apple corp too, I had sent them the mass-letter from page 136.
Nice guy, but basically said it was 'within Apple's specifications', after having discussed this with engineers.
I was expecting that much. I was also told that contrary to what the Geniuses told me, I wouldn't be able to get it repaired until it met my satisfaction - again, because if it meets Apple engineers' specs, it means that all is well and the problem is in our head... (well, that's what it means, not exactly what he said).
I have some experience in dealing with customer service in the high tech sector. Nice attitude but firm denial of any wrongdoing, because they will spin a user experience issue as a problem with the user, not the piece of technology.
I'm going to the Apple Store tomorrow again, and will be asking for a repair (again), or if I am denied repairs because they're on my case and use the 'within Apple's engineering specs', I shall use the other alternative: ask for a full refund.
If I am refused that, well, it really will end up in court, just like the old times...
sigh
To think that they deny a problem based on some unilaterally, unknown, and arbitrarily-defined specification of what an engineer is expecting from the display performance, is a fascinating but untenable defense. We have made many use cases available as to what qualifies as unacceptable, for instance, photo editing, web design, radiology and neuroimaging use cases, even the issue of the risk to personal information and privacy.
As a final comment for now, from a logical and objective/empirical point of view, the fact that there exists even one display from a vendor (say, Samsung) which does not exhibit this phenomenon justifies that the customer should expect nothing less than this problem-free variation on the final product. An honest retailer would not say that they sell IPS LED-backlit LCD displays to people, brag about it on their product description by using all sorts of funky characterizations, but then ultimately sell three or more flavours of completely different products in reality, such as the poor S-IPS (In-Plane Switching) from LG, the awesome Super PLS (Plane to Line Switching) from Samsung, and whatever AUO/BenQ makes (called A-MVA, which is probably even worse).
The only person I anticipate will be happy to hear about that is my lawyer.