Near the end there is a section titled "Why Bright People Procrastinate the Most"; it includes the side-note "Bright people have the capability of freaking out faster and more dramatically than anyone else."
Now, with my well-honed ability to procrastinate (see: how I got through junior high; how I got through high school; how I got through university, dissertation, and exams; and how I can't count the number of all-nighters I've done in my life), and my nearly unmatched ability to freak out with great haste and melodrama, I must conclude that I am in some way bright. My brain very quickly catalogues (and visualises in glorious detail) all the terrible ways one very simple thing could go wrong, until I'm twiddling my thumbs and whistling Sesame Street songs to avoid the obvious embarrassment, pain, death, or jail-time in which any action would inevitably culminate.
I suppose it's one way to come to that conclusion, mm? Funny to have the traits that make me feel most stupid actually indicate that I'm not, and group me in with many other very bright people.
So I shall leave you with a fitting quote, one which is also side-noted in that section of the book:
I am an old man and have known a great many troubles, but most of them never happened. - Mark Twain
Happy procrastination, ye bright stars of my constellation of friends!