for this purpose i would say that Wii sports shouldnt be included fully into the US attach rate, but should be cut by about half... if it wasnt inc i bet the US wii sports total would be at about 1/3, but also that some people would buy other games... so half seems about right
some wii owners probably only have wii sports.
as for games bundled with the ps3 not being counted, if that is so then any other bundled Wii games wont be counted either [there are many places that do their own bundles, some stores dont let you buy a Wii with just sports]. i would have thought ioi would have considered that when he gets the numbers.
as for the currently low software ratio for all three, it is of course going to go up in the consoles life, the ps2 attach rate was low in its first year, mostly because everyone was just trying to buy the console and partly due to only being in Japan for the first 7 months [Jp ratio for home consoles usually seems to be lower than US, wheras handheld is higher i think]
Using japan, the highest attach ratio 30 weeks from launch for a console has been the playstation1 at over 4:1, wheras second place was either saturn or dreamcast at about 2.8:1 generally lower hardware numbers make higher ratios [the 'failed' sega and x-box consoles, along with the PS1 and Wii, make up the top spots.
