Half a million Android activations per day is impressive, however you look at it. According to Google's Android boss Andy Rubin, half a million new Android devices are being activated daily. Not only that, the the numbers are growing by over four percent every week. Those numbers are frankly astonishing.
Back in January, Apple announced (in a roundabout way) over 360,000 daily iOS activations, and at that time Google was seeing 300,000 activations.
Gadget Lab, Andy Rubin: 500,000 Android Activations Daily