Apple's retail stores have been ranked as the U.S. retail chain with the highest sales per square foot for a number of years and according to a new report from Asymco’s Horace Dediu, the company also outranks competitors when it comes to revenue per visitor, hitting a record high of $57.60 per visitor in the first quarter of 2013. Apple experienced a seven percent growth in visitors during the quarter, leading to an average of $13 million in revenue per Apple Store, which is the highest it has been during a non-holiday quarter. During its Q2 financial results call, Apple