"As a result, rather than measuring precision/recall as a percentage of domains or as a percentage of urls we usually try to measure it as a percentage of resul

"As a result, rather than measuring precision/recall as a percentage of domains or as a percentage of urls we usually try to measure it as a percentage of results that appeared on a search result page or results that users click on, mined from our logs." So this basically means that you are able to discern content spam on authoritative domains (facebook, wordpress.com, etc) based on ctr, bounce, impressions compared to surrounding serp results rather than comparing that data against the parent domain as a whole?