A slew of season premieres hit the airwaves Monday night and virtually all of them were down significantly from a year ago. NBC, which got a headstart last week and wound up as the most-watched network, slipped to second place among total viewers, but most of its numbers were solid amid strong competition, and the network came out ahead among younger viewers, the demographic group that counts most with advertisers. For Example, The Voice attracted 11.93 million viewers versus 14.58 million for ABC's Dancing With The Stars, but the voice averaged a 4.3 rating and an 11 share in the 18-49 age group while DWTS earned a 2.7/7 in that demo. Meanwhile, Fox's new The Mob Doctor, which debuted to poor ratings a week ago, saw those ratings drop further, pulling in 3.96 million viewers and making it the lowest-rated show of the night. CBS's series premiere of Partners debuted with a so-so 6.50 million viewers.