IIRC a Cal 20 sailed Pacific Cup (SF to Hawaii) a couple of years ago... It arrived a couple of weeks behind the first to finish; but corrected to 1'st place.
I think too much is made out of the PHRF numbers. These are ratings based on displacement hull designs with the assumption that the boat does not plane. The extremely low, even negative PHRF ratings that are given to larger and faster boats (like maxis, cats, etc) are for their ability to exceed hull speed (plane). The smaller boats will plane or surf more readily than a larger hull and when they do it's going to far exceed it's downwind PHRF rating, which only accounts for it's non-planing theoretical hull speed.