My site currently ranks #1 for my main keyword on yahoo and bing and has done for years. I used to rank #1-7 for the keyword on google and hundreds of related keywords. After penguin google hates our site now. We rank nowhere in top 200 for our keyword with no penalty applied, contacted google and they say no manual action has been taken. Its nuts.
Bit of a rant but from what I see if you try to rank for a keyword with anchor text in links google will punish you for it. Google is totally nuts. New sites with no links rank better.
My advice is to avoid any form of anchor text on site or off with your keyword trash bags in it. Just use your site name to try to dilute your link profile from trash bags.
