Yeah. You can identify as a desktop, but that means it wouldn't affect the tablet metric at all (while it might skew the desktop browser metric). Some other browser like Dolphin let you identify as an iPad or iPhone, which IMO is far more useful since many sites assume wrongly that android supports flash. iPads and iPhones tend to get served pure html5 video. This is a global setting in Dolphin, not a per-page thing. Now that would affect the tablet market measurements, but comparatively few people use that browser (or one like it) and even fewer use that option.