Nielsons is actually a fairly accurate source. There is a reason why their data is relied on by every single major TV outlet to book millions of dollars of ad revenue. That being said this doesn't mean anything except for determining usage of various demographics so that they can target those groups .
All of the people here are obviously here because they are mainly hardcore gamers (regardless your choice of console), which means it is likely your usage will be much higher then the average person because it is something you like to do.
I have both a Wii and 360 and I always go to the 360 instead of the Wii unless I have friends over my son is in the mood for some MK or SSBB. But even my 5 year old son prefers my 360 and has been begging me to get him his own.
