Yes, I have heard of this study, although I have not actually read it myself. We had quite a "chat" about it some time ago on the Pyr group I am on.
I do still use one, but since my boy is missing a front leg, I feel it is much easier for him to eat and drink with his elevated bowls, than to have to lean way down to the ground with only one leg, although he can do it. Bloat and gastric torsion are not quite as common in Pyrs as it can be in some of the other breeds, although it is always a concern, and something that I do think about. I am cautious to make sure he stays fairly quiet after he eats/drinks, and so far, so good. In 30 yrs. with Pyrs, I've never had a problem....... ...but that's not to say I haven't seen it with other Pyrs.