Another day, another advertising controversy involving one of the top three US wireless service providers hits the headlines, yet again highlighting the great lengths at which Verizon, T-Mobile, and AT&T are sometimes willing to go to prove each other's superiority over the competition.Of course, said superiority is a relative and often highly subjective matter, whether we're talking about download numbers or overall network performance, which isn't exactly the message directly conveyed or implied by the vast majority of commercials and publicity stunts meant to promote ...