Stand back, it’s hashtag team time. Which social media platform is most effective for B2B marketers? Our digest of this week’s content marketing news suggests it’s a cage match between LinkedIn and Twitter. You’ll find news about social platform effectiveness – and why these platforms play to an increasingly mobile crowd – in this week’s TDA Content Happy Hour.

Inc. 500: LinkedIn Replaces Facebook as Top Social Tool
By Lenna Garibian at Marketing Profs
Garibian’s piece plucks social highlights from the recently released Inc. 500 index, which aggregates trends at the fastest-growing private companies in the United States. In 2012, Garibian reports, 81 percent of these companies used LinkedIn, surpassing Facebook usage. The article lists increased CEO involvement in content as a new trend, along with a boost in blogging as 44 percent of Inc. 500 companies now publish a blog. Other snapshots of corporate social behavior include YouTube usage, Pinterest adoption, and the growth of FourSquare.

LinkedIn: The Ugly Duckling of Social Media
By Evelyn M. Rusli at The Wall Street Journal
Stock price can be a good gauge of popularity, and Rusli’s article in The Wall Street Journal suggests that LinkedIn’s stock is soaring because B2B organizations pump more than $486 billion annually into the social platform. More content-related products, Rusli writes, may help LinkedIn continue to be relevant for the B2B crowd – and keep it in the investment community’s good graces.

For B2B SMBs, Twitter Gets the Best Social Leads
Staff report at eMarketer
Lead effectiveness might be this week’s counterpoint to recent glowing news about LinkedIn. According to this eMarketer article, research from marketing software provider Optify concludes Twitter provides a whopping 82 percent of social media-originated leads for small and medium sized-businesses (SMBs). This piece also breaks down the number of leads these companies get from social media and other sources.

19 Things Successful People Do On Social Media
By TJ McCue at Forbes
If you want to mimic what C-level folks are doing with social media, you might want to give this story a read. McCue’s list of 19 things that influencers do with social media includes listening carefully, posting judiciously, using more than one network, and favoring quality over quantity.

Report: Nearly 40 Percent Of Internet Time Now On Mobile Devices
By Greg Sterling at Marketing Land
If it seems to you that more and more social media activity is taking place on mobile devices, then your instincts have been confirmed by recent Nielsen and comScore research. Sterling reports this research shows that Internet access takes place on mobile devices almost 40 percent of the time, and he includes charts that illustrate the kinds of content mobile users are most likely to access.