There is a brewery by me that uses this in all their beers except their wheat. To me their beers do have a less full body and their hoppier IPAs don't really taste all that hoppy to me, until I have a couple of them. I haven't done a side by side evaluation but the beers do feel light bodied. I am interested in hearing from somebody with celiacs trying a beer with clarity ferm and see how they respond.
Interesting about the IPA's. This study found an increase in IBU's in the beers that use Clarity Ferm. It only averaged about 3-4 IBU's, which is borderline undetectable by most, but still worth noting.