Users of flagship smartphones such as Apple’s iPhone 5s and Samsung’s Galaxy S4 are continuing to suck down more data than their tablet-wielding counterparts, according to a large-scale survey of mobile data consumption in 2013 conducted by JDSU (which last year bought mobile data analytics company Arieso, the company that previously ran the annual survey).

Is there something about the evolution of the architecture of mobile phones that makes later models consume more data? Is there a correlation to the adoption rate of the most recent OS rev? In other words, the latest model of a phone enables faster transmission speeds and typically runs the latest OS. Or is there something more complex at work here?