Excerpt:
"AT&T has been at the forefront of learning how wireless carriers deal with heavy data usage," Golvin said. "They are really the pioneers. And if any other carrier had the kinds of traffic loads that AT&T has had to deal with as a result of the iPhone, then they would have the same problems. And for anyone to claim any different is crap."
source
http://www.cnn.com/2010/TECH/mobile/06/17/cnet.att.iphone.4.apple/
"AT&T has been at the forefront of learning how wireless carriers deal with heavy data usage," Golvin said. "They are really the pioneers. And if any other carrier had the kinds of traffic loads that AT&T has had to deal with as a result of the iPhone, then they would have the same problems. And for anyone to claim any different is crap."
source
http://www.cnn.com/2010/TECH/mobile/06/17/cnet.att.iphone.4.apple/