While most marketers leverage Facebook and Twitter to communicate with customers, not nearly as many consumers comment about these companies and brands on the social sites.

AYTM Market Research found that 57.8% of US Facebook users had not mentioned a brand in their status updates as of October 2011. More heartening for marketers is that just 0.5% of Facebook users posted only negative mentions about brands on Facebook. More often, they reported commenting on brands in a positive way (25.3%) or with a mix of both positive and negative mentions (16.4%).

via Most Consumers Still Don’t Talk About Brands on Social Sites – eMarketer.