Which
marketing claim? I can't recall seeing a marketing claim for
any digital back, including the CFV 100C; which suggests or implies you can use any lens, with any angle of coverage, under any conditions without limitations or potential image issues. There are limits to the compatibility of chief ray angles (CRA) between a lens and sensor. It's a fact of photographic life.
Marketing "A Trifecta of Imaging Possibilities" seems to be offering "possibilities" to the user,
not unlimited or unrestricted compatibility assurances. That said, perhaps there will be some improvements in compatibility with lenses having extremely wide angles of coverage (not to be confused with angle of view) in the future for the CFV 100C.