I don't think there's any direct correlation between manufacturer and screen issues. I believe that's the conclusion of the survey conducted here. I have an LG and it's perfect.
Dead pixels are most easily identified by looking at an all white or all black screen. Even then, they're hard to see on a retina display. Keep in mind the MBPr display has a dot pitch of 220 pixels per inch. That means there are 48400 pixels per square inch. If you had one dead pixel on your display, a single dot somewhere in the vast array of pixels would be either flipped on or off meaning it would be a 1/220" static black or white dot.
Actually the issue is made even more complicated since it's a color display/