The thing is, no one is claiming that the Pandaren aren't clearly an allusion to Chinese culture. What we have been saying, if you were paying any attention, is that these same blatant allusions haven already been in the game and you either haven't noticed them or don't recognized the culture they're coming from. Tauren are just as blatant a reference as Pandaren in everyway. They copy the language, the speech, the architecture, the music, even down to the peace-pipes.
The only difference is that Panderan have an entire continent inspired by their culture. Which isn't surprising considering the breadth of Chinese culture. And the fact its one of the world's oldest, and most continuous.