Traffic from Facebook represents 6.34% of visits for the past 30 days, which I find impressive considering by FB business page has 40 some followers.
Twitter gives 7.56% and Google 11.47%
Not so long ago Twitter was my best source of visitors. I don't know if it's a good thing or not that Google is now first, but I tend to think it's good :-)
But I wouldn't let go tweeting and using FB, I like to have the ability to communicate with followers