from the same report:

"Only about three in ten young people say they have rules about how much time they can spend watching TV (28%) or playing video games (30%), and 36% say the same about using the computer. "

Meanwhile: " Over the past 5 years, time spent reading books remained steady at about :25 a day. "

So...25 min a day reading, 7 1/2 HOURS a day using screen media...