Reading about Facebook's marked success moving to mobile made me have a look at the OS of the readers of Passle content. 

Our users creating expert content are almost always in a B2B context so our audience is very different to social networks. However, I was nonetheless surprised to find that the desktop audience has increased over the last 12 months. 70% of our readers are on desktop and 30% on mobile.... with desktop up nearly 4% on a year ago. 

30% mobile is by no means trivial but it is a very far cry from the numbers shown in the graph below. 

This would suggest that marketers should think first about how their B2B content will appear on a desktop and thereafter worry about how it will  respond to mobile.