A story generating buzz and controversy earlier this week amounts to a stinging indictment of the SEM industry as a whole. It was based on new research from eBay that argues paid-search is all but worthless and has little or no impact on traffic and sales — except in marginal cases. However…

Please visit Search Engine Land for the full article.

Link: 

AdWords “Ineffective” Says eBay, Google Research Contradicts Those Findings