The issue of self-selection appears to be at work with that particular series.

Recent polling done in Iraq appears to contradict the message being released and also has the advantage of being scientifically done by multiple organizations.

http://www3.brookings.edu/fp/saban/iraq/index.pdf

http://abcnews.go.com/images/US/1033aIraqpoll.pdf

http://www.opinion.co.uk/Documents/FINALTables.pdf