I have 2 noticeably clusters of dead pixels on my retina 2015 15" MBP. I do have the AppleCare Protection Plan so I am still covered and I heard that they are still quite accommodating for extended warranty customers. Here are some pics.
Just bring it in, and you'll find out if its covered. It doesn't matter what we say here on the board. No doubt many of us will say they'll replace, but at the end of the day you need to reach out to Apple