Sorry! Gotta brag.
Having said that, this survey is --of course-- subjective and looks at it from the perspective of a company looking to post employees worldwide. There are, no doubt, strong arguments to be made for other criteria and other cities. Having spent time in Chicago, NY, L.A., San Francisco, Portland, Seattle and Honolulu, I can say that those cities also great places and a lot of fun. Nonetheless, I also gotta say Vienna is deservedly rated high. It's pretty sweet.
http://www.guardian.co.uk/money/2010/may/26/vienna-tops-quality-of-living-list