netmeg - 5:13 pm on Mar 11, 2013 (gmt 0)
Danny reported on a discussion at SXSW regarding Google working on an algorithm to find and demote "bad merchants". They don't give any specifics of course, but the general feeling is to look for signals beyond reviews, because there are so many fake reviews.
Matt Cutts says:
We have a potential launch later this year, maybe a little bit sooner, looking at the quality of merchants and whether we can do a better job on that, because we donít want low quality experience merchants to be ranking in the search results.