A number of people have had problems with screen flaws and the new iPad. I went through several, and ended up walking away without finding one that was acceptable to me. But many people have found good ones.
Check out this thread for more info: https://discussions.apple.com/thread/3810949
I bought the ipad retina for my wife recently. In the shop I compared the ipad 2. I am a printer engineer and could definately see colour imbalance in the retina. There is too much red. We compared other ipads and the retina was the same. If i was purchasing this for work use to show customer samples for web or print based work I couldn't use it. The images we sampled were all apple images.A blue flower looked purple and I could see red in the greens too.