9. The system of claim 8 , wherein: the first profile characterizes one or more respective interactions with electronic documents in each of the first result sets of electronic documents responsive to search queries of a first category, the search queries of the first category are selected from among a plurality of queries including the search queries of the first category and other search queries, the second profile characterizes one or more respective interactions with electronic documents in each of the second result sets of electronic documents responsive to search queries of the first category, and the indication indicates that the first scoring algorithm is better than the second scoring algorithm for scoring electronic documents responsive to search queries of the first category.
9. The system of claim 8 , wherein: the first profile characterizes one or more respective interactions with electronic documents in each of the first result sets of electronic documents responsive to search queries of a first category, the search queries of the first category are selected from among a plurality of queries including the search queries of the first category and other search queries, the second profile characterizes one or more respective interactions with electronic documents in each of the second result sets of electronic documents responsive to search queries of the first category, and the indication indicates that the first scoring algorithm is better than the second scoring algorithm for scoring electronic documents responsive to search queries of the first category. 10. The system of claim 9 , wherein the first category is navigational queries, commercial queries, long queries, short queries, or general queries.