I read this post on the e-consultancy blog. OK, it is consumer focussed but at the heart is a strong message for SME businesses about response rates. High-end fashion brand Burberry allocates around 60% of its not insubstantial marketing budget to digital and boasts around 15 MILLION Facebook fans yet a good response rate from these fans is LESS THAN 0.15%. The average is much lower than this. Maybe the 15-20% open rate on your email marketing isn’t so bad! You can read the full article here