Weren't we already spending too much time online?

Today's SmartBrief from The Business of News reports:

Tablet owners' daily Web usage is 48% higher

• Tablets appear to increase by nearly half the amount of time their owners spend online and double the amount of time they spend on mobile devices, including phones, according to Knowledge Networks. In all, tablet owners spend 38% of their daily screen time on mobile devices. The data suggest marketers need to pay attention to mobile and the kinds of campaigns that work on these platforms, said Robert DeFelice, vice president for client services at Knowledge Networks. MediaPost Communications/Online Media Daily (10/3)