I'm really curious about the color temperature thing. I got a new iPad. It was noticably greener than my iPad 2. Maybe yellower, but the specific app I was noticing in, there's an area which is basically tan on my iPad 2, and noticably green on the new one.
Swapped it. Still noticably greener. Went to store, set the wallpapers on all their ipads to the tree rings. On all the iPad 2 units, it was a warm brown; on all the new iPad units, it was more purely yellow. They gave the glue explanation (which I'm pretty sure is just plain wrong), and also claimed the color was better.
Well. That's a testable claim! I have gone looking around and I am now pretty sure that the new iPad is right and the iPad 2 is wrong. I have compared with, among other things both a Transformer and a Transformer Prime, a macbook Air, and a somewhat-calibrated (with a spyder) NEC IPS display.
The iPad 3 agrees most strongly with the NEC display. Basically, comparing among all the displays I have handy, the Air and the iPad 2 seem to have pretty poor saturation, with a tendency to redder tans and browns, while the "new" iPad, the NEC display, and the two Transformers all seem to have richer colors.