You have to give ATT, Nokia, and MS props. I never expected an update of the magnitude this quickly.
I have spent years on Verizon and Sprint and never saw an update like this in the first 6 months....
I understand that this hasnt been normal for ATT either, but you have to give them credit here.
Also have to give credit to MS too...I'm sure by preventing "Sense", "Motoblur", and whatever the Samsung one was called really shortens the test cycle.
Overall this is a very good start to the Support and Sustainability aspects of Windows Phone 8.