Short Lived CMOs

An article in today's adage.com discusses recruiting firm Spencer Stuart's latest survey on the longevity of chief marketing officers. The key result: The average CMO lasts in the job only 23.2 months, down from 23.6 just two years ago. More than 50% of CMOs surveyed had been in the job less than a year.

The causes? The implications? I have my thoughts, which I'll share in the comments. Your thoughts?