Sure. Because every time someone buys a new game for X console, it naturally becomes their most played console for the next week(s).
But I'm pretty sure that's not the point of these. So I'm guessing the point would be having another poll with clickable options.
On a typical day, I can't block out an hour or so to play games which means the iPhone sees the most game use, but not the most hours per week since virtually all of the games are like commercial breaks to play with while killing a few minutes here and there.
Sit down gaming time is about the same between PS3 and PC.
Currently a bit less with the PC since I set up a new boot drive on my workstation without any of my Steam games installed. If I want to game, I have to do it on my slower PC hooked up to the HDTV currently.