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Moreover, the same idea applies to specific keyword ranking. If you acquire too many links of some specific anchor text, comparing to the overall number of links with THIS anchor text + SYNONYMS that you already have, your site will temporarily go down in serps for the corresponding keyword query.
New links however - errr - well they seem to suck big time.Could it be since the launch of Panda with what we all know damage to very good sites, Google has maybe frozen some of the ranking factors until the team can get the real big bug in the update cleared up. I can see this might be a possibility to keep the serps semi frozen untl they can get this worked out.
can you define "low value" and "high value" sites?