According to the just-released 2013 Temkin Experience Rankings, which queried 10,000 U.S. consumers about customer service issues across 246 companies in 19 industries, Sam's Club and Amazon earned the top spots in the retail sector and RadioShack was the lowest rated retailer for the third consecutive year. The retail industry, on average, was tied for third out of 19 industries studied and one of four industries with an average rating of good.