User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-5774152-20130114235455/@comment-4902593-20130119120507

You must take into consideration that Jason summoned lightning while Percy did not use any of his powers against the former. Besides Piper interfered with the duel, so it wasn't a proper duel. Also you must remember that Percy knows how to use his powers even better than Jason, so I guess the Kansas duel does not tell us any clear result.