Last week we saw the carriers’ growth numbers for Q3 2010, and AT&T completely blew away Verizon with new subscribers. Despite mass availability of Android phones, Verizon only added 1 million subscribers in Q3, its lowest total in years. AT&T added 2.6 million. It’s now completely clear why Verizon has finally capitulated and cozied up with Apple —even with tons of Android models, Verizon simply can’t compete with AT&T in terms of new subscriber growth. Right now the question du jour among iPhone aficionados is how many net subscribers will leave AT&T and switch to Verizon once the iPhone becomes a reality in January 2011. That number is going to be a lot larger than people think for a series of compounding reasons.