Correct me if I'm wrong, but I believe the last (folkstyle) high school national champion from Kansas was Scott Coleman--a mormon. All 95 kids in that family placed at state (excluding Dave, who went on to become a ballerina). Needless to say, no more research needs to be done on this topic, as this one case proves my theory.
Next to Mormons, a religion where two families could probably make up an entire team, I'd say those of us at Peace Lutheran (both Hat Town and Saint Francis) are the 2nd most dominant religion. And we have delicious grape juice. So we win.