My boss had ordered his phone from Sprint a week after it launched. I bought mine from the Sprint store in my local area.
When setting our phones next to each other, there is a glaring difference between the two. His phone has whiter whites, and blacker blacks, where as my screen had dull colors comparably.
More importantly, I'm also experiencing flickering screen brightness when the phone has darker color tones on it, on everything from the loading screen on the Play Store, to the gamefly website, to lower-light pictures. Sprint has already replaced the phone, and after a few weeks, it has started doing it again.
This is by far more annoying than dealing with duller colors.