[Xantar]

Well, having an audience of younger people does have one disadvantage, and I'm sure that's why Nintendo has made an effort to appeal to gamers 18 and older:

Older gamers have more money since they tend to have their own jobs. Thus, they buy more games. Google around for a bit and you will find that the GameCube has the lowest tie-in ratio among the three consoles (it's something like 7.2 per console which still isn't that bad if you think about it. It's more than enough to make up whatever loss they have on the console).