You've seen the ads. Verizon users walking around with a map above their head showing the coverage for Verizon 3G while passing an AT&T customer with a skimpy map. What a change in marketing for Verizon, which went from ads about strange people using their service to these ads that show the difference and don't tell the difference.
What has AT&T's response been? To attempt to convince people that they need to surf the web and talk on their phone at the same time. Everytime Verizon runs this ad they are hitting homeruns while AT&T is bunting.
The power of Verizon's message is in the showing and avoiding the telling. Less words more images. This is even better than the "Can you hear me now?", which was extremely effective but still didn't dramatically show what that meant.
Something else to think about when seeing these ads. Verizon is scoring a double punch with this. Currently BlackBerry users who want 3G should go with Verizon, but the bigger message is AT&T customers using an iPhone are penalizing themselves. They may have a cool phone but because of AT&T they have limited coverage. This is a iPhone vs BlackBerry ad without actually mentioning either product.
When the iPhone contract runs out with AT&T (If they ever let it) and Verizon is able to sell iPhones, you will see a large number of their install base make the switch.
AT&T better come up with something better than post cards and surf/talk ads.