How fast can a Hallberg-Rassy be?

That the new generation Hallberg-Rassys are fast is no news. But just how fast can they be? A Hallberg-Rassy 64 just achieved increadible 20.8 knots on the North Sea and another Hallberg-Rassy 55 reported even more in the Mediterranean: 20.9 knots! Has anyone achieved any higher? Please report to