Sunday night's Grammy Awards scored strongly (no pun intended) for CBS, averaging a 13.7 rating and a 21 share -- well ahead of last year's results when the music awards show captured a 12.3/19. The Grammys overwhelmed the competition, peaking in the 9:00 p.m. hour with 21.78 million viewers. Even ABC's Desperate Housewives had to settle for second place this year, registering an 11.8/17 (18.13 million viewers). The awards show marked something of a comeback for the Dixie Chicks, who accepted five awards, including those for song and record of the year. The group had seen itself shut out of many country radio stations three years ago when its leader, Natalie Maines, disparaged President Bush at a concert in London. Even their song of the year, Not Ready to Make Nice, failed to find an outlet on several top country stations last year.