Joined: May 2006
I can't find the references at the moment, but I recall reading statistical studies indicating that while 6-foot-tall males comprise a (relatively) small proportion of the U.S. population, that CEO's are predominantly 6 feet tall or more.
All other factors being equal (education level, "personality" etc.) people seem to view height as indicative of leadership rather than other factors.
Here's some anecdotal commentary on the subject: I'll try to hunt down the actual studies --
AtBC Award for Thoroughness in the Face of Creationism