Barry reports that, they’ve spotted three values “Pscore,” “mCPC,” and “thresh” being displayed under some AdWords ads. The values might reveal some details on how Google may rank AdWords ads. It appears no one in the United States has seen any of the scores. All the ad examples I have are from Google international specific search engines.
Danny discovered a document via a Google search, which might reveal some more information about what this pscore is. The document says:
Another is pscore which is used for storing the value calculated by PageRank. according to the score. The value of pscore represents the linked [...]
The pscore might be related to PageRank and could indicate that ads are having PageRank criteria used as part of AdRank or quality score.
Google, AdWords, PageRank