We stayed for a couple of nights at the simple but lovely Mint Hotel and enjoyed their surprisingly good (not to mention good value) afternoon tea. They had a lovely selection of sandwiches, nice scones, and nice, not too heavy cakes. The Piccadilly Lounge is a lovely place for people watching.
It gets a solid 8.5 out of 10 on the Scott Scale.
That makes my current rankings look like this:
1. Peninsula Hong Kong 9.5/10
2. Lovejoy's San Francisco 9/10
4. Mandarin Oriental Hong Kong 8/10
4. Westin Melbourne 8/10
6. Ritz-Carlton Singapore 7.5/10
7. Hyatt Hotel Canberra 7/10
7. Langham Place Hong Kong 7/10
7. Regent Singapore 7/10
7. Sheraton on the Park Sydney 7/10
7. Swissotel The Howard London 7/10