I am also interested in this. Lots of sites use the same description for the same products as I do but the descriptions are quite short.
Hi Due to large no. of Domains that either completely match other content or are similar to that. When we index our site in google the webcrawler (spider) looks in his data base whether the keywords , meta tags and content are not similar to any other domain if he see 's that this site has no duplicate or similar content then the webcrawler (spider) of google index's your site. Thanks
Google is the boss and i think he can do anything because he has some extraordinary tools and self made software which could track duplicity instantly. so never try to make Google blind because i tried once he banned my blog and also Adsense account....
An old article Google’s Matt Cutts on Duplicate Content and More http://blogoscoped.com/archive/2006-08-02-n60.html