CBS CEO Les Moonves predicted Monday that the network would score its first ratings victory in the May sweeps since 1983. He particularly credited the recently completed Survivor: The Australian Outback and the new drama CSI: Crime Scene Investigation, both of which aired on Thursday night against NBC’s ordinarily unbeatable Must-See TV lineup. “The month of May clearly demonstrates the shift in power,” Moonves told reporters. But NBC quickly responded that it had won the month among adults 18-49, the demographic group most prized by advertisers. NBC Entertainment President Jeff Zucker remarked that had it not been for the XFL ratings disaster, its numbers would have been unchanged from a year ago.