I have seen a few iPads 4 and have noticed that on all of them the whites appear more yellow than on the iPad 3, which shows then much much better and clearer. You can check this on YouTube videos comparing both of them, specially in safari and when games are loading with white backgrounds. I think it's because LG is now making the displays for the iPad 4, whereas Samsung was making the displays of the iPad 3. I find this a big drawback to buying the iPad 4. It can be 2x faster but I would hate seeing the whites in a more warmer tone.