Sometimes I wonder if ADD is partially a consequence of high processing speed. When your mind works at the speed of light and pictures and ideas appear from every mental direction, it can be very easy to get pulled down a series of tangents to the topic at hand (no, I don't have ADD, but I do process information very quickly, and often have to struggle to stay focused).

I don't know much about ADD and wouldn't be surprised if there was also some anatomy or distinct biochemistry at work, too. But still, it wouldn't surprise me to see some kind connection to processing speed (and maybe working memory, too).

Feel free to say YOU'RE SO WRONG, VAL!!!