[GFischer]

Sometimes it's tough, and a survey is a poor but doable substitute - I don't know how I would go about interviewing women in the +100k earnings range, and for one of my projects I did a survey because the potential customers were geographically far away.

However, I'd never have invested so much before knowing the audience.

And he had this HUGE problem of having invested his ego on a (probably very cool) solution, which is one of the toughest challenges for us tech types.