a few things... about attach rate to help you guys out.
A) attach ratio pretty much always goes up. PS2 has such a huge attach ratio because... well duh... nobody buys PS2's anymore. A bunch of people are still buying PS2 games though. 360 being out a year longer is a BIG help because well... the 360 has way more "average months" of ownership. Which months of ownership/games bought has it's own flaws but is better then attach rate... though isn't really used anywhere.
B) Systems with lower sales often have higher attach rates. Really the PS3's floundering sales are confusing.
C) Attach rates also tends to go up when there is a large upswing in console sales. Usually someone buys 2-3 games with a system while the average person only buys 1 game every few months. Hence the PS3's attach rate is climbing faster because of the upswing in console ownership. This may or may not level off depending on how sales go.
D) Wii comes with Wii Sports. Which isn't counted. Really all things considered it's doing quite well.
E) There numbers appear to have no source.
