Social media multitasking and the death of the billable hour

Thanks to the web and social media, interruptions have become not just a way of life, but a way to work according to data out from Cisco.

We're conducting more work in smaller increments, but why are we still using the billable hour?

Source:
http://gigaom.com/2011/09/21/social-media-multi-tasking-and-the-death-of-the-billable-hour/