AT&T had ZERO presence at the 2011 CES.
Verizon had a GINORMOUS booth, with lots of devices to touch and play with.
Sprint had at least two, also with gadgets, including one outdoors with a DJ, 10 PlayStation 3's and freebies.
Also, my iPhone 4 had constant problems with data around the LV Convention Center during the show. Likely a problem with network congestion. Even if they didn't want to do a booth, they could have rolled up at least one of those mobile cell stations.
So me (and likely others) were using their iPhones, and getting poor data performance from AT&T. We're being courted by Verizon & Sprint, who have some admittedly nice phones. And where is AT&T? Nowhere.
AT&T - you failed. You should have had a booth at CES, and you should have done something to improve network performance around what is probably the biggest technology trade show in the United States, if not the world.