My opinion is not to go looking for dead pixels to be honest. The chances of you noticing one without running the screen tests are pretty slim. I have four of these - three are perfect - one has one dead pixel that I found today because I was an idiot and said "what the heck - let's see if this one is perfect too." I would have NEVER noticed that darn pixel -- EVER (wait is darn a curse word here on OCN?). Now I know it is there. Luckily it's location makes me have to go hunting for it to see it in everyday use.
And to the point about perfect Dells, Apples, etc - they aren't either. Even A+ panels can have a dead or stuck pixel - they just weren't caught at the factory. Even then, like was stated above this is a return and replace issue - not an RMA defective panel issue unless it is over the company's pixel policy.