Office clutter

I recently surveyed the office and below are typical workstations.

I was startled, however, to come across one exception to the rule:

A work area that was uncluttered!

What would explain this? Was it some sort of personality defect? Was it a lack of creativity? Was it a result of too much free time?

No, none of these explanations is true. After hours of deep thought, assessment and analysis of the facts I have come to the answer. The one with the tidy office has Windows Vista on his PC; the others are running with XP.

Problem solved!