Nearly impossible to say. The only evidence I could supply is anecdotal, which would be highly unrepresentative at best. That being said, 5/8 people I know that have a Wii could be considered part of the expanded audience. So, according to my limited information exactly 62.5% of Wii purchases are accredited to this expanded audience.
Of course I don't necessarily believe this, just trying to illustrate that any number we give is simply a guess based off what our experiences are.
But to answer your question, yes, I do believe this 'expanded' audience makes up a fairly large peice of the pie.







