Eh, it's just been my experience that CLAMP fandom is crazy resistant to multishipping (because, like bard_linn said, the canons usually have that whole "most special person" thing going on). And they're not very receptive to pairings they don't perceive as canon, either.

Pffft, as if the twins thing in TRC makes a difference. I still ship 'em anyway. And SeiFuuma too, despite the fact that they're supposed to be brothers.

...I love that comic.