Poor customer satisfaction with social media sites

Customer satisfaction with social media sites is poor according to the E-Business Report 2010 from the ACSI (American Customer Satisfaction Index).
http://www.foreseeresults.com/research-white-papers/ACSI-e-business-report-2010.shtml

It apparently has the lowest industry aggregate score of any of the e-business or e-retail industries measured, with Wikipedia leading the pack.

Although this report is from the USA, it does show that these global sites need to consider their users first and their functionality & revenue generations second.