Duel points only really dictate who has the best 2h heroes and polearms.
In battle some clans might do much better than their performance in duel...you know...because of teamwork, that stuff that is suppose to differentiate a clan from a bunch of pub players banner stacking.
Fallen, for example, isn't getting much justice. They do really well sometimes in battle because they work together.
Anyways nice graphs ;o