Xbox households in the US spend an average of 84 hours a month on online services

"Yusuf Mehdi, who heads up marketing and strategy for Microsoft's Xbox business, said households now spend an average of 84 hours a month on the Xbox Live online service playing games, watching videos and listening to music. That's up 30% from a year ago. Just over half that time is spent on videos and music.
By comparison, the average household spend about 150 hours a month watching television.
"What we're seeing is that people are turning on the Xbox to play games and then keeping it on afterwards to get other types of entertainment," Mehdi said."

Source:  LA Times, 26th March 2012