I think that, in CLAMP's mind, these kind of OMGshocking revelations sound all epic and unbelievably twisted, when it's actually all confusing and WTF (or LOL sometimes) on the outside.

It reminds me of this (http://youtube.com/watch?v=cWWtb2uDDfE) (it's a parody of M. Night Shaymalan's movies, but lately I keep imagining Ohkawa saying "what a twist!" in the same fashion XD)