Thinking about it...
I'm actually only 30% geeky, and Macca isn't really geeky at all, being only actually 1%!
And I'll tell you why
Only 4 choices means I should get 25% if I'm not geeky at all. If I'm actually 50% geeky I'll get the other half of the quiz correct 1/4 of the time, so add 12.5% and you get 62.5%!
Working around that gives us:
Actual geek percentage = [4*(Given geek percentage) - 100] / 3
Thus yielding Nanor's, Macca's and I's actually pitifully geeky scores