What's the right mix for U.S. fast-food companies in China? Though forecasts for the QSR market in the nation range as high as spectacular 50% growth by 2015, some analysts remain wary the novelty could wear off and burn those expanding too fast. China plans: 1) McDonald's (MCD +1.4%) wants 2K locations by the end of 2013 which will still stand far below the 5.2K outlets Yum Brands (YUM +1.2%) operates. 2) Starbucks (SBUX +0.9%) is easing into China with a plan for 1.5K stores by 2015 3) Privately-owned Subway has 374 locations with more on tap. 4) Burger King (BKW +0.1%) (<100 locations) and Wendy's (WEN -0.2%) are currently non-factors but keep talking up China.