Apple’s iPhone 5s is currently more than doubling the sales of iPhone 5c, according to a survey conducted by Consumer Intelligence Research Partners (CIRP). Based on the survey, the iPhone 5s made up 64 percent of iPhone sales following its launch in September. The iPhone 5c accounted for 27 percent of sales, with the 4s filling in the gap with 9 percent of the sales. CIRP notes the iPhone 5 grabbed slightly more of the iPhone market than the…