comScore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released the results of a study on mobile gaming highlighting the potential for growth in the mobile gaming market despite a 13-percent decline in the number of U.S. mobile gamers during the past year. This overall decline was driven by a 35 percent decline in mobile gaming among feature phone (i.e. non-smartphone) subscribers, who represent approximately 80 percent of the market,