Super Bowl XLV between the Packers and Steelers has surpassed last year's record-setting game in the Nielsen Co.'s preliminary ratings measurement of big cities. Last year's game between New Orleans and Indianapolis established itself as the most-watched program in U.S. television history, with 106.5 million viewers. An overnight measurement of the nation's 56 largest media markets, this year's game had a 3 percent higher rating than last year's.