Makes sense sorta - Avg member of a household of 4 plays on Wii 5 times a month (IE: one person plays all the time, the rest, almost nothing). Wii is played 2 times a day with a 50 minute avg.
If that is true, then that would totally debunk everything. That would make Wii owners pretty damn core playing almost 2hrs a day. That doesn't seem likely either.