[Nutbutt]

Before Iphone was introduced on ATT the service was really good with no real problems. Comparisons between Verizon and ATT were comparable. Then ATT got Iphone and the influx of subscribers overran the bandwidth and ATT started accelerating the 3g network upgrade. Things are now getting better even with the record sales of Iphone being applied to ATT.
Look at Verizon, an outdated CDMA network, slowly upgrading to LTE. Their system is going to be more overloaded than ATT based on their network.
I'm stay put with ATT till Verizon can get out of the CDMA network ! If you think Verizon is going to be any better, think again ! The laws of physics apply ! only so much data can be pushed through the network and the expected verizon additional phones/data will be worse than any thing ATT has ever experienced.