Bullhorn Reach released a new “Social Recruiting Activity Report,” finding that LinkedIn rules the roost in terms of social networks most used by employers for recruiting purposes. Not a huge surprise, given the nature of LinkedIn.

The firm measured LinkedIn, Facebook and Twitter’s frequency of usage by recruiters and their effectiveness for sourcing candidates and found that “LinkedIn is blowing away the competition in terms of job views and applications.”

“Even Twitter (Twitter!) is ahead of Facebook in these metrics,” a spokesperson for the firm tells WebProNews. “For job applications, LinkedIn is driving almost nine times more applications than Facebook and three times more than Twitter.”

Here are a few more specifics from the report:

• LinkedIn adoption growing the fastest. Despite earlier adoption among recruiters, LinkedIn continues to grow at the fastest pace. The average recruiter adds 18.5 LinkedIn connections each week, compared to 3.3 Twitter followers, 1.4 Facebook friends.
• LinkedIn leads job views. LinkedIn drives more views per job than Twitter and Facebook, generating three times the amount of views of Twitter and six times the amount of Facebook.
• For job applications – LinkedIn gets it done. Recruiters who post jobs on social networks are likely to receive more applications from LinkedIn, with the social network driving almost nine times more applications than Facebook and three times more than Twitter.
• Twitterers are more likely to apply, though. Looking at the relative number of applications per contact, a Twitter follower is almost three times more likely to apply for a job than a LinkedIn connection.

Bullhorn also put together the following infographic based on its findings: