MADISON, WI â?? June 4, 2008â??DoubleClick Performics and Netconcepts, the leader in natural search marketing, today announced that the two companies are renewing their several year partnership, which enables DoubleClick Performicsâ?? clients to quickly transform their dynamic, e-commerce sites into natural search friendly pages. Studies indicate most online shoppers prefer searching for generic items over brand names. These enhanced natural search capabilities are of benefit to both retailers and the customers they serve.