4. The method of claim 3 wherein generating a score indicating a degree to which the plurality of ranked content items are responsive to the query comprises generating a score for a given content item based upon a degree to which plurality of ranking features of the content item are responsive to the query.
4. The method of claim 3 wherein generating a score indicating a degree to which the plurality of ranked content items are responsive to the query comprises generating a score for a given content item based upon a degree to which plurality of ranking features of the content item are responsive to the query. 5. The method of claim 4 wherein a ranking feature of a given content item comprises information regarding at least one of in-links associated with the content item, anchor text associated with the content item, a uniform resource locator associated with the content item, a term frequency inverse document frequency associated with the content item with respect to the query, and a title associated with the content item.