I don't think it's reasonable to divide such a large number of people into strict groups. Demographics are ok, but they're usually broad groups with 'tendancies'. However, you are using a particular game as some sort of metric for core Nintendo fans. Unless you had something to compare like with like with, I don't think that's possible. You'd have to show another game with a demonstrably similar 'core attach rate', and give sufficient reason for why Twilight Princess should follow the same pattern.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.







