I know this post & replies were made with US customers in mind, but I'd like to take this chance to warn UK customers that I asked about this at my local Apple Store just today (I was having my iPhone screen replaced) and I was told that iPads with dead pixels (or any issues/defects) are absolutely NOT being dealt with instore -if purchased originally online, of course. I know this because I asked specifically about this and showed my amazement -they deal with iPhones and MacBooks that have been bought online, so why not iPads? 😕
So, if you purchase an iPad from the UK Apple Online Store and it is defective, it must be returned & repaired/replaced through the Online Store and not the bricks-and-mortar Retail Stores. I personally thought that this was a pretty poor stance from Apple.
Again, I stress that this relates to the UK and not the USA, where I'm sure they wouldn't get away with pulling this ****.
Edit: I just noticed that billyjoegibsonx above was given a different answer, so I guess they lied to one of us. However they were absolutely adamant in their answer given to me today.