brinked - 11:22 pm on Nov 7, 2010 (gmt 0)
Dave, not at all. Their algo is not perfect. It never will be. If it was perfect then there would be no spam ever in googles index. But there is, sites always manage to sneak through. Google may be pushing questionable sites to the top to see what kind of feedback they get about it. Spam reports can help confirm that it is indeed a spam site, and they can use that data to adjust their algo. I know if I ran a search engine, this is something I would do. I would also track bounce rates. For example, if 90%+ users click through to a search result, then go back to click on another site almost instantly, this could tell google that this site is of very poor quality, and users have no interest in it.