Parkdalian
Senior Member
As always, these sorts of things are incredibly arbitrary in how they develop their rankings. Toronto is up there mainly because of it's quality of living and "knowledge and influence":
http://www.knightfrank.com/wealthreport/Documents/pdfTheWealthReport2010.pdf
http://www.knightfrank.com/wealthreport/Documents/pdfTheWealthReport2010.pdf