Yes, this is an astounding achievement. The actual improvement over the previous record is about half what you wrote. From his website: " The new record (yet to be ratified by the WSSC) is 42 days, 16hrs, 40mins and 35secs slashing a massive six days and 10hrs off the existing record." This time is only about two days slower than the current fully crewed record and about two days faster than the second fastest fully crewed record. He also set a new record for a transit of the Pacific ocean for all sailboats. Just phenomenal!