The broadcast networks have grown older than ever — if they were a person, they wouldn’t even be a part of TV’s target demo anymore. According to a study released by Magna Global’s Steve Sternberg, the five broadcast nets’ average live median age (in other words, not including delayed DVR viewing) was 50 last season. That’s the oldest ever since Sternberg started analyzing median age more than a decade ago — and the first time the nets’ median age was outside of the vaunted 18-49 demo. Fueling the graying of the networks: the rapid aging of ABC, NBC and Fox. The three nets continue to grow older, while CBS — the oldest-skewing network — has remained fairly steady. ‘The median ages of the broadcast networks keep rising, as traditional television is no longer necessarily the first screen for the younger set,’ Sternberg wrote. For the just-completed 2007-08 TV season, CBS was oldest in live viewing with a median age of 54. ABC clocked in at 50, followed by NBC (49), Fox (44), CW (34) and Univision (34). When live-plus-7 DVR viewing is factored in, the nets (except CW and Univision) drop by a year — […]