Which Social sites generate the most traffic for you?
For me it is Facebook by far, followed by Twitter and Google+. I also tend to get a fair amount of Pinterest traffic to my blog when I pin content on a regular basis.
What is interesting is that Facebook traffic is second only to what the top 3 search engines are sending me. I noticed this occurring quite recently.
FWIW, my site gets over 70% of its traffic from mobile users as well.