A report from McKinsey Global Institute(July 2012) indicates that:
[...] knowledge workers spend 28 hours each week writing emails, searching for information, and collaborating internally. Per MGI, Web 2.0 technologies — such as social networks, ratings and reviews, wikis, discussion forums and crowd-sourcing, among others — could represent a 20-25 percent improvement in knowledge worker productivity. With internal knowledge and external information more readily available via social media — a typical information worker could reduce information searching time by as much as 35 percent, returning over 6 percent of an innovation or knowledge worker’s workweek to other tasks.
MGI estimates that two-thirds of the value creation opportunity afforded by social media technologies comes from an organization’s ability to better communicate within and across the enterprise.