I am approaching my 5,000th twitter comment. It's about 90% real life and 10% real estate. My clients and friends have always been positive about it. I have a few hundred followers and often clients leave compliments while I work with them. I love all the social media that I do, but sometimes I wonder if I'm talking too much. I'm KnoxvilleRob if you're looking.
Oh, and YES - it has brought in clients. Several, in fact.