Windows Phone Thoughts: Windows Mobile Device Center and Vista: Did You Go Back to XP?

I've seen something mentioned over and over in our forums here and at Smartphone Thoughts: some people are having so many problems with Windows Mobile Device Center (WMDC) that they're actually leaving Windows Vista and and going back to Windows XP...and the shockingly less-problematic-than-WMDC embrace of ActiveSync. So, quick survey time...and comments/explanations are definitely welcome because I realize there are many possible variables to your answer.