I never knew if I was highly sensitive. Yes and no, hard to say. I also wasn´t sure how to answer many questions in the test. Plus I don´t know what the effects of caffeine on me would be because I don´t drink coffee, and don´t know what means to "go off by myself". Anyway I tried to do the test and got 14 points, which is exactly the middle.
One thing I wanted to say, I think people who scored high on the test are very likely to be aspergers. Aspergers are very sensitive to noises and light, especially fluorescent lightning (I am not sensitive to light or fluorescent light, noises bother me sometimes extremely, other times not that much - especially I hate the sound of TV from the next room - it freaks me out).