Purchased an ipad air today. I noticed the screen was slightly yellow in a corner and in comparison to my very white and bright iPad 3 was overall dimmer. Did a return at the Apple Store and asked to check the new one out before I left. It looked good, but when comparing it to the iPad 3 I brought with me the whites were noticeably yellower. They suggested I compare both to the demo models. Three that I checked were whiter than the one I had just opened. They said they were consistently coming out the same in the boxes and would authorize one more exchange. I was more than fine to do a full return at this point as I am not spending $500 on a yellow ipad. The third came out the same as the first two. They mentioned "adhesive" and letting the screen settling in. I know the glue issue of the iPhone 4 is not present here but figure I was either tremendously unlucky, they tried really hard to select great demo units or perhaps the unit does brighten after use for a period of time for whatever reason. What say you. I kept it for a week to see if there is improvement. If not, I'll swap it out for a kindle fire. Are they blowing smoke or have any units improved after a few days?