Well, if this is as fast they say it is... then it´s fast!
That's fast...but it does not seem they are going at 20K even less at 25K
Strange choice of sails: Only main? If the wind increases they will be in trouble. They will not be able to lower the main without turning to the wind and turning to the wind only with the main it will be very difficult even with the engine helping. Maybe it is different with a Pogo but I doubt it.
Anyway we can confirm that a Pogo 12.50 is very easy to sail and even sailed in a "strange" way and fast the boat remains stable and safe.