Is 58 a lucky number in some set of beliefs? I once noticed that the average age of non-executive directors at large companies in the UK was a pretty consistent 58. I recently updated this to 2008 and, no surprise, it remains 58.

For the four to five executive directors, or management, if you're outside the UK, on the "average" board the average age also is a pretty consistent 50 and a bit. Is it just me that finds this peculiar? Such parallelism is probably hard to find in nature or business but it sure exists on boards of directors.