Share 'Does promoting your business on this site and others really result in sales?'

I am new to the social networking arena, and have been putting a lot of time and energy in getting my companies name out there. I was trained in the old school of cold calling, and it has worked wonders for me thus far. Now, I hear about this new technique, and I have decided to give it a try. I have joined this group, facebook, twitter, linked in...bought face book ad space, updated our websit...