Seems like it is mostly European cities
European cities dominate the worldwide rankings of locations with the best quality of living, according to Mercer’s 2008 Quality of Living survey. Zurich retains its 2007 title as the highest ranked city, followed jointly by Vienna (2), Geneva (2), then Vancouver (4) and Auckland (5).

In the UK, London ranks 38, while Birmingham and Glasgow are jointly 56. The highest entry for the United States is Honolulu, appearing at number 28. The cities with the lowest quality of living ranking are Ndjamena (211), Khartoum (212), Brazzaville (213) and Bangui (214). Baghdad, ranking 215, retains its position at the bottom of the table.
Quality of Living global city rankings

Over here it is being reported in the news as "Kiwis beat Aussies"