In case any of you were wondering, there is a ranking:
http://www.longfinance.net/Publications/GFCI%2012.pdf
Centre Rank Rating Rank Rating Rank Rating
London 1 785 1 781 – 4
NewYork 2 765 2 772 – 7
Hong Kong 3 733 3 754 – 21
Singapore 4 725 4 729 – 4
Zurich 5 691 6 689 1 2
Seoul 6 685 9 686 3 1
Tokyo 7 684 5 693 2 9
Chicago 8 683 7 688 1 5
Geneva 9 682 14 679 5 3
Toronto 10 681 10 685 – 4
Boston 11 680 11 684 – 4
San Francisco 12 678 12 683 – 5
Frankfurt 13 677 13 681 – 4
Washington D.C. 14 672 15 677 1 5
Sydney 15 670 16 674 1 4
Vancouver 16 668 17 667 1 1
Montreal 17 667 18 658 1 9
Melbourne 18 657 20 653 2 4
Shanghai 19 656 8 687 11 31
Jersey 20 654 21 652 1 2