[Arryn]

So what you're saying is that the ceremonial ritual for god-calling is (fundamentally) no different than that of a spell ritual (which also isn't granted a bonus in CF)?

Then I submit that the description should not refer to the bonus as applying to a "religious ceremony", since ceremonies are traditionally prayers (which in this game's terms means spells, not preaching). I suppose that the devs intended to mean that in CF preaching is ceremonialized (and thus very ritualized), but that blurs the line between what is preaching and what is a magic invocation (ritual) and the language one uses to describe such should be chosen more carefully to make this very clear. (Or, at least, explicitly state that god-calling isn't included in CF's effect.)