Who is #1?

A new Gallup poll:

"Which one of the following do you think is the leading economic power in the world today?"

China: 40 percent
The United States: 33 percent
Japan: 13 percent
The European Union: 7 percent
India: 2 percent
Russia: 2 percent

By contrast, check out this GDP ranking (or, if you prefer, the PPP-adjusted ranking).