Yep I've got a week 12 here, seriously it was assmebled only a few day before I got i last weekt. Also has a tinge to the screen still so no dice yet, but not as bad as the earlier one i got refunded on (built mid feb)
Rang applecare and i said I'm not bothering with a refund becuse I could get a worse screen by all reports. They said fine, and I've got 12 month warranty, so if the screen issue is fixed across the board I can get a repair later on - not an exchange though.
I wasnt sure about this so confirmed it with friendly applecare guy twice, and he said for sure if I have issues in 12 months even though I know of it now, later on I can get a repair if its found to be defective. (which is might not even be - because its still a slight difference nowhere near what other people have shown)
Maybe this mean they are getting better, but I doubt it until I see more proof. Myself I'm not risking getting a worse screen, even though I clearly see the problem. Heres hoping there is a fix I'm eligible for under warranty soon.