Infographics about use and power of e-mails

Wrike is project management and collaboration tool, using e-mails a lot.
Today I received their posing about real power and use of e-mails, tells a lot and I like the charts and graphics they use for it.
It is worth the minute or two to check: http://www.wrike.com/blog/5-Mind-Blowing-Facts-About-Email