Watching TV makes you Smarter, But not cause of TV but the Medium

Watching TV makes you smarter Steven Johnson argues in this article in the New York Time Magazine

He then goes on to talk about a lot of TV shows that I don´t know cause I rarely watch TV. While I think that Steven Johnson has a point he does miss the key issue here and that is that it is not watching TV that makes you smarter: it´s that video, properly used is a much more powerful mean of transfering information than text. A movie has 5gb of information and you get it in 2 hours. A book has only 5mb of information that is a ratio of 1000 to 1 and it takes you 30 hours to read. So any information packed in video format reaches you much more quickly. When you watch video you are multitasking, you are using your eyes AND your ears, trough your eyes you are getting an incredible wealth of images, through your ears words, sounds, music. Writing is sounds turned into letters, turned into words, turned into grammar, turned into meaning. Writing is just slow, very slow. The only good think about writing maybe that because it´s so slow it gives you time to think. That could be the only reason why reading text may sometimes make you smarter than watching video.