CNN Posts Big Gains/Grows Most in April 2011 vs. Year Ago CNN Press Room - CNN.com Blogs
CNN Posts Strong Gains in April - Increasing 31% in Primetime vs. a Year Ago; Tops MSNBC in Total Day in Both Total Viewers & Demo
In the Arena is Up 30%, Piers Morgan Tonight Increases 20% and Anderson Cooper 360 Grows 35%; While FNC declines Each Hour in Primetime
John King, USA is Up 58%, The Situation Room Grows 44% in Demo
your link doesn't have Fox new's numbers in it.
I have no way, from the information you provided in this post, to verify if your claim is true or not. I can verify that CNN is doing better but I can't verify if fox is doing worse, better, or the same.
I would assume your claim is right that if more people are watching CNN then less are watching fox, but maybe its just MSNBC that lost viewers to CNN and not fox.....i dont know I dont have any figures provided by you to verify this.