I have a few posts on here about my dead pixels and have had 12 different iPads from 2 different apple stores.... They have all had some kind of defect and I have finally got one that I'm happy with even thought it has a dead pixel.... If you can see a dead pixel easily then it is more than likely 2 or 3 together (I have had this) but I have also had single dead pixels (like my current ipad) which are very hard to spot, and cannot be seen with normal use, you have to look hard for them..... My advise (which has now changed) is: your never gonna get a perfect iPad so just enjoy it like I am now instead of stressing over little things like I did....