i try not to let my lo watch tv yet, his dad and their family always have the tv on and when it is off have a tendency to watch the empty screen whilst you talk to them (maybe its just i am boring?) i would go so far as to get rid of tv if dh would allow it! thats just me though, and i know that, as a compromise we are getting a tv cabinet built (so i can hide it away)
a friend of mine came to stay for a while and her 4 year old had a kids tv show on one morning and when i came into the room ds (who was crying when i put him down to do something for a minute) was transfixed by the box! had stopped crying and everything.
anyway, what i was initially going to write about was a study that they did (for a tv series, i do watch sometimes, called "child of our time"). they found that kids watching adult shows definately understood the emotions going on but didn't always understand the plot (kids were shown a soap with a man being pushed over a cliff and thought it was a fight over some candy). don't know if that helps or not!