For the moto razr release, the chart seems to show that they will start their advertisements next week and continue for about 3 weeks, then advertise moto products in general ie the bionic, razr, xoom 2?. It is odd that the rezound only gets 2 weeks and then nothing after that, but then again the only other htc products from this year are the thunderbolt and incredible 2, not exactly recent phones they want to be advertising, so there is simply not enough devices for an htc portfolio. The samsung portfolio will likely include the nexus, charge, stratosphere and the galaxy tab.
As for the iphone/best network, at&t and sprint also have the iphone, so they are putting the focus on their network, the other releases (except possibly the nexus) are verizon exclusives, so no need to advertise that a verizon version is the better version.