The ads have some risks:
People who are outside of 3G coverage, or who fail back to EDGE because of 3G congestion, are sure to try this out and not understand why it doesn't work.
no more risk i think than sitting by allowing people who are trying to pick a carrier to believe that they will get more COVERAGE in MORE AREAS with VERIZON over AT&T, regardless of whether it's 3G or not.
i hate to break to all the people who keep posting on this topic whenever it comes up, but there are a massive amount of people out there that just don't understand technology. a lot of people of this forum don't fit that profile. the problem for AT&T and Apple isn't whether Verizon is honest about the 3G coverage or not, it's that Verizon (despite what they have claimed) is counting on people not understanding cellular technology and getting from their ads that if they go to Verizon they'll get MORE coverage.
AT&Ts position is that while technically that may be correct, they have the ability to say "yes, there are areas we don't have 3G. but when that happens, we have other systems in place to pick up the slack."
i'm not defending AT&T hear. while i believe they have invested a lot into upgrading areas, i personally don't think they've done it fast enough. add to that, they have been absolutely horribly at maintaining a relationship with their customers and COMMUNICATING with us. they should be keep us informed and in the loop and doing a better job of PR with that regard. their PR has sucked as bad as their customer service over the years.
regardless, while Verizon may be saying it's all about 3G coverage, in the end it really goes much farther than that. ATT would be stupid to sit by and watch. maybe they'll get their act together improve that coverage in the process.