How anybody is able to say for definete how varied a certain demographic is , is beyond me . It would take some pretty indepth statistical analysis to show exactly how diverse a console's demographic was in comparison to that of another console.
Game sales won't tell you how diverse a demographic is , marketing & promotion , pricing etc could convince a very similar demographic to buy a diverse range of games , games that don't neccaserily agree to their tastes.
Comparing game sales relevant to other consoles won't get you your answer partly because of the last answer , comparing PS3:Wii:360 is also innacurate because of the variance in userbase sizes.
Assuming that a demographic will become more diverse as it becomes large is similar to assuming that a city with 10 million people will have more gay people than a city with 1 million people , it may very well be the case that the number of gay people in the smaller city outnumber the gay people in the larger city 50:1 . We can't just look at things quantativley to reach any sort of serious conclusion , we need to know the qualitive factors and that requires data we don't have access to.







