Comparable sales at J.C. Penney Co.'s new shops within its stores, including those selling Izod sportswear and Levi's jeans, are running 20% higher than sales elsewhere in the stores, per CEO Ron Johnson. In a webcast for analysts, he said that since the company has only 12 of the "stores-within-stores" now, it's too early to draw conclusions. Some have been open for only three weeks and others for seven. The company plans to transform its stores into a collection of 100 specialty boutiques by 2015.