Of course, this relates only to those sampled, but there's no question that the inclusion of Siri gives users one more reason to tap into their data plan. According to prior studies, the iPhone 4 used only 1.6x more data than the iPhone 3G, while the iPad 2 consumed 2.5x more data than the iPhone 3G. As time marches on, more and more websites are tailoring themselves for mobile use, and there's obviously no stopping the proliferation of data-sucking apps. Whatever the case, we'd just encourage you to mind that data tier (if you're in one) -- wouldn't want to have to ask Siri how to raise money to cover overages, no would you?
*Verizon is currently in the process of acquiring AOL, Engadget's parent company. However, Engadget maintains full editorial control, and Verizon will have to pry it from our cold, dead hands.