Not sure what your point is (other than trying to sound like a know it all). Top speeds are fun, and no one said "we sailed around the track at 30 knots"
On Voom we finished over an hour behind you, but from our GPS track, we averaged 11knots over the ground, you would have had to average a fair bit more than that. Our top speed on the GPS was 21.5 under kite, 19.8 when 2 sailing with 2 reefs and the storm jib.
Of course there is lots of slow times.For us, it was the bottom of every one of those steep waves, or the turning around for 24 minutes to search for and pick up the hatch