Update from the trenches
I've used my credit card at ~40 establishments in China during the past several weeks, and 3 have tried to pull DCC on me:
-Mint
-Muse
-JW Marriott
In all 3 cases, I've adopted the same strategy:
1) tell them to bill me in RMB
2) when they refuse, cross off the USD amount and write something like this: "I will decline this purchase unless billed in RMB"
3) only the JW noticed #2 and the GM stopped by my table to bring me a RMB slip and inform me that he would train his staff about DCC
Bottom line:
-while arguing over $5 in a place like Mint might embarrass some of you, it's my pleasure to help correct this problem
-if nobody steps up to the plate, this disease will become more widespread
-shame on Visa for allowing things to play out this way