http://www.neogaf.com/forum/showpost.php?p=8400170&postcount=1
Excellent post here, quantifying the fact U.S. 360 owners buy more software. Wii sold slightly more software than 360 in it's first Jan-Sep period on the market, but it's attach rate was a good deal lower. The upshot being that Wii sold much more hardware than 360 did in it's first Jan-Sep, but only a little more software. PS3 also was around the same rate as Wii.
By dividing the average length of time each console's owner had their system for in the Jan-Sep period by the tie-in ratio for the Jan-Sep period, it shows that the average gamer for each console on average bought software...
Wii: every ~8.69 weeks
360: every ~5.62 weeks
PS3: every ~8.12 weeks
Clearly, 360 had the much more active user base, with PS3 in a distant 2nd and Wii in 3rd. This does not include Wii Sports.
Excellent post here, quantifying the fact U.S. 360 owners buy more software. Wii sold slightly more software than 360 in it's first Jan-Sep period on the market, but it's attach rate was a good deal lower. The upshot being that Wii sold much more hardware than 360 did in it's first Jan-Sep, but only a little more software. PS3 also was around the same rate as Wii.