To complicate things, it should also be pointed out that listing the manufacturer is not necessarily the answer to supplying the information people want. People want to know the hull shape/design.
For example, Vectorworks Marine is now making two boats for the F16 class -- the Blade and the G-Cat. If the results listed Vectorworks as the manufacturer (VEC), this would not tell people what they really want to know.
SO, I guess what we are really talking about is the specific model/design of hull rather than who built it. The builder would be a secondary item of interest.