My ds had rather watch tv than do anything else. (ASD-9 years old). I do not allow him to watch it all day, I make him come and "socialize" with the family. Which he spends most of the time asking when he can go back lol. It is his only real "escape" from his day to day school work and therapies, and on bad days I do allow him more time. I think it's up to you how much is too much, with our children, nothing is "typical".