The SpatialStrategy.makeQuery() at the moment uses the distance as the score (although some strategies – TwoDoubles if I recall might not do anything which would be a bug). The distance is a poor value to use as the score because the score should be related to relevancy, and the distance itself is inversely related to that. A score of 1/distance would be nice. Another alternative is earthCircumference/2 - distance, although I like 1/distance better. Maybe use a different constant than 1.
Credit: this is Chris Male's idea.