The average midsize or large company (1000 employees or more) has 178 “social media assets” (Twitter handles, employee blogs, etc.)–yet only 25% of companies offer social business training to their employees. (Marketingeasy)
Lots of good stats about social selling for B2B, including: "Among B2B companies, LinkedIn was the most effective, with 65% having acquired a customer through the professional network, followed by company blogs (60%), Facebook (43%), and Twitter (40%). (Marketing Charts)"
See on socialsellsb2b.blogspot.com