Then I guess I'm not, either. Nor is my mother.
Yes, I'm in the tech industry. But since most people run Windows, a lot of people have information to help out. Just go out and ask people in your workplace if they have a computer, and if so, what OS do they run. If they don't know, they run Windows. The rest will answer Windows 90%+ of the time.
I've educated my mother to only run Firefox and use Agnitum Outpost.
Agreed that IE has the market share, and that is probably the biggest issue.