According to Scott Monty, head of social media for Ford Motor Company email is still the most frequently used online communication tool. According to Scott 42% of social media users and 27% of non users check their email more than four times each day. 

Scott says that this is a clear indication that email lives on as the most important online communication tool despite the age of Twitter and Facebook. Scott says: "People still use email as a primary method of sharing interesting news, keeping in touch, and notification.

[Source: The Social Media marketing Blog]