You didn't get agreement from over 90% of people. That's not at all what it says. You agreed with the majority 90% of the time. If you don't understand the huge difference, let me illustrate an easier to understand example. Suppose 1000 people answered 1000 questions, and all answers individually are in a 50.1% vs 49.9% split. There's essentially no agreement at all in the group, but you got a 90% score yourself, simply by siding with the 50.1% majority on 90% of the questions. Suppose also all 1000 people each choose a unique set of the 100 to dissent about. So, you're in agreement with exactly 0%, the group itself essentially agreed about nothing, yet you still scored a 90%.