Cool test. I don't know about the accuracy though. Usually the more you have to type, the more accurate the test will be. I type pretty fast thanks to working on the computer so much. I also took a typing class in high school. It almost ruined my 4.0 GPA, but I ended up getting a lot out of it. After four years of coding and typing papers in college, plus so many posts on this and other forums, I've become pretty good. I probably average around 40 words per minute if I'm copying something, faster if I'm just typing my thoughts.
Ryan