I receive my DataColor Spyder4 Elite today. I color calibrated my rMBP(10,1) and my ATD to sRGB standard. When the calibration was over for both monitors the before and after showed there no perceptible change. So the good news is that indeed rMBPs and good old ATDs should be leaving the factory very close to sRGB standards. And in my case, the rMBP has not drifted in around 2 years and the ATD in just over one year. Keep Calm and Calibrated.