Learning that there are alternatives John Stewart also mentioned the Oprah effect. For the days leading up to her leaving the air, there was quite a hooplah. A few days after she was gone, alternatives were found and she is no longer missed.
Besides alternative ways of wathing a program, there are also alternative things to watch. Viacom should know better that viewing habits of kids is hard to change. So once they are weaned off of the Nick programs, it may be difficult luring them back.