Return it if you are in the window. Don't bother with genius bar replacements. Get a fresh 14 days and the option of getting a refund if they can't deliver.
Apple's screen suppliers have been terrible these past couple of years. I had no complaints about my 2009 17'' MBP, but gone through at least 7-9 bad screens on various devices since then (iphone 5, ipad 3, ipad 4, ipad air, ipad rMini).
They simply can't market the retina display the way they have been and allow these things to happen. Who cares about pixel density when half of your screen is yellow or if you have terrible backlight bleed.
Yeah, it is really disappointing...
I have been having bad luck with Apple displays lately.