First Night of Sweeps Goes to NBCFri, Apr 25, 2003 10:01 AM PDT LOS ANGELES (Zap2it.com) - Fast National ratings for Thursday, April 24, 2003In a battle of dueling pop stars on the first night of sweeps, Madonna was a clear winner over Michael Jackson, helping NBC win Thursday's ratings race. NBC averaged a 12.9 rating/20 share in primetime to score a narrow win over CBS, 12.1/19. ABC was third at 5.7/9, with FOX, 5.0/8, in fourth. In the metered markets, UPN averaged 3.9/6 and The WB 2.7/4.Among adults 18-49, NBC averaged a 9.6 rating. CBS finished second at...