I’m not USian so I have no direct experience, but the reviews of the Verizon iPhone4 are showing about half the upload and two thirds the download speeds that users are getting on AT&T. Is AT&T’s coverage really bad enough to warrant that drop in speed?
Although AT&T advertizes itself as reaching 99% of the US population, the signal does not seem to penetrate buildings, basements etc. as well as Verizon's does.
Coming to congestion,the iPhone led to heavy 2G and 3G usage by subscribers and AT&T's network in highly dense areas really struggles badly with the data congestion.
