Just got a 15" in the UK. Slightly bluer screen on the right. I don't care! I have spent far too long with far too many IPS screens, it's just a fact of the technology that this is inherent; some kind of combination of 'dirty screen door' and less than perfect white/gray uniformity. IMHO if you have screen that like those pictured in this thread, and no dead pixels, and your machine is cosmetically OK, exchanging it because of screen uniformity is a fools errand; all will have some uniformity problems, it's the nature of the tech. In the future OLED will help, but for now looking for perfection? Good luck as you'll need it!