brinked - 4:10 pm on May 29, 2012 (gmt 0)

Panda: Devalue pages whose content is mediocre - not spam but not strong either. These pages were ranking for technical reasons rather than being strong content that visitors really appreciated.

I am going to have to disagree with you there. I have an ecommerce client that was hit by panda. He was ranking #1 for his term for many years. Since panda, he now ranks on the 35th page and the last result on that page. He is now the very last result for that term, a severe penalty and I think I have an idea why.

He is currently being outranked by blank pages, affiliate redirect url's etc. If that is not a penalty, then I do not know what is.

This is more than a devaluation. I think we all can agree that there is a lot that goes into panda. Ecommerce sites might be effected differently than a news story site. I am not disagreeing with you completely that there is no devaluation going on with panda, because I do believe there is. But its a mixed bag of different classes that deals with many different kinds of webpages and how it effects them.

As for panda. I have 3 sites that were effected by panda since it was rolled out. I have been able to recover many clients from panda but not myself and it has been eating away at me. But I noticed that all 3 websites have 1 thing in common. They all received their rankings due to 301 redirecting websites I bought from competitors. It seems that after panda, these redirect benefits were lost. Maybe because I did a crappy job in redirecting, I only did the homepage to homepage and didnt worry about any inner pages.

I removed all 301's over 3 months ago and the rankings were not effected at all. The websites that were being 301'd have regained their original ranking, higher than the sites they were being redirected to.

So in this case, it is likely a devaluation of 301 redirects.

How do you know that these sites weren't affected? If, as you say, many spammy pages have been de-indexed and their links devalued, then it seems to me that this would cause a "chain reaction" that would spread the effects throughout the web. Some sites may have been effected only slightly, and some of these may have even gained in the rankings as other fell, but I doubt that many sites have been totally unaffected.

I don't. No site I monitor has lost significant traffic since penguin. Some have gained and some have lost very little but then recovered, probably not due to penguin. If any of the sites I monitor were effected by penguin, the effect was so minimal that it has gone un-noticed. I am not going to worry about every algo update that has a miniscule effect. Google releases many updates a month that may or may not effect traffic on a daily basis but traffic to all sites has been steady this entire year (fingers crossed). I even have 1 site that doesnt depend on google at all and is blowing up huge so I am excited about having not to depend on google for that one.