So despite the drummer being the most frequent butt of lame band jokes it turns out they might be the brightest of the bunch... oh ya! At the Karolinska Institute they've found out that intelligence and rhythmic accuracy go hand in hand. They also demonstrated a correlation between high intelligence, a good ability to keep time, and a high volume of white matter in the parts of the brain's frontal lobes involved in problem solving, planning and managing time.
Ok one drummer joke... How many drummers does it take to change a light bulb? None, they have a machine to do that now :)