Hope this is true: http://www.webpronews.com/topnews/topnews/wpn-60-20060809SES2006ImportanceOfQualityScores.html
The biggest line I read in that article is that if retailers organic rankings go down, they will spend more on ppc to stay or increase current internet sales. This would suggest that information sites will not be hurt at all but that retailers will be. I did not see any type of solution for this problem in the article, only suggestions that things will keep on going the way they currently are. Google not having a "hard definition of a quality site" means they have no solution to the current spam problems. What is the difference between a retailer selling online the same product someone is selling through an amazon affiliate account? Are affliate accounts spam? I can take my amazon feed and populate 100000 products in my ecommerce store overnight, brick and mortar online retailers can't. It's hard to draw a line in the sand with the beach always changing. No one can control the tide on the internet at this point.