uh I think apple's dead pixel policy was if you had 5 more dead pixels than you can return it. However, there's been numerous members here that got an exchange for just one dead pixel, but these were in-store purchases. Just pray! You took a risk when you ordered, just like everyone else.
I wouldn't worry that much over it. For every one person who gets a dead pixels there are a hundred times that number of people who don't.
I just spoke with my rep. She said dead pixel is covered by warranty. I recorded the phone conversation just in case.
I'm pretty sure if you're trying to return a custom machine for a single dead pixel they'r eat least going to charge you the 10% restocking fee.
That's 1%? Quite a big number