IIRC The HUGE Containership Sealand McLean holds the Pacific crossing record at four days eighteen hours. I think that was San Francisco to Japan. The ship was huge, but was one of I think three traded to the Government in the seventies as they were too expensive to operate, and the theory of the times that speed was everything to compete in that Industry turned out to be not true.
My point is that a vessel the size of the SL-7 Sealand McLean, (it was the largest of its day, and way ahead of its time within the industry) can cross the Pacific in that amount of time, it’s quite realistic to believe these trimarans could achieve that stated speed.