I think the most significant quote from the results is

"unless your company is operating at a CMM level 3 or higher -- don't upgrade and simply deploy new systems on 2005."

This is putting some governance metrics around the way shops are organised, and their ability to deliver stable applications.  Although CMM certification is still a minority sport, the CMM process is relevant to everyone. 

If your organisation cannot match up to CMM level 3, then you should know at the outset that any upgrade to SQL 2005 is almost certainly going to go over time and budget, and will initially give a less stable environment than you have now.  Even if you or your management believe the opposite...