The AppleCare experience has actually been good to me. I'm on my 4th screen (three iMacs and one replaced screen) and this last one appears to be a keeper. It isn't perfect, but its close. I will say that it is much better than the pic you posted - I saw the tinge right away without enlarging the pic. I swear the some people's eyes are 'calibrated' differently than others; some swear they can't see it and for others, it pops right out.... and I'm to the point where I believe them both. And as stated earlier, it's YOUR eyes that count here.
I know it's frustrating, but Windows 7 is the alternative, and I don't think its "there" yet. I could use Windows 7, but I don't WANT to use it everyday at this point. Linux? I love UNIX in general (which is why I enjoy OS X so much...) but not for my only home system. The only reason I mention this is that the OS quandary was a big part of what kept me on the Apple side of the fence.
But the real reason I posted was to say the in my experience, AppleCare has been the only bright spot in an otherwise dismal process. If it weren't for them, I don't think I would have lasted through two machines. Overall, they have been pleasant, professional, and sympathetic to my plight. The typical customer service experience doesn't even come close these days.
Good luck to all who continue to deal with this!