I'm just starting to get my hands dirty w/ adCenter but I can't quite figure out the QS metric. I understand that QS does not affect ad rank and provides more of a measure as to how competitive the market is for that particular keyword, but are the relevancy factors also a part? AdWords has huge emphasis on CTR. WordStream breaks out the factors for AdWords in this nice presentation here: http://www.wordstream.com/understanding-quality-score-webinar. Is there anything similar for adCenter? Also, Keyword Relevance, Landing Page Relevance, and Landing Page User Experience are all around 2-3 range but the Quality Score is 9-10. How do I interpret this?