I'm no proffesional in ships, but after a bit of google investigations, I've come to understand that the game seem to be doing it right:
A small ship, such as the sloop, creates less resistance against the wind and goes faster than a massive ship.
A Large ship that gains momentum is capable of sailing "over" or ignoring the resistance of waves more easily, thus attaining greater maximum speed with full wind.
I think that with the sloop gaining up to 4 crew members, the galleon will remain an attractive powerful and fast ship, where as the sloop will become and even more dangerous slightly slower in full wind and certainly more fragile, but very agile ship.
Making the sloop faster than the galleon would feel extremely strange to me.
PS: Please correct my science if you must, but provide sources!
"Generally bigger boats with a long waterline length have the ability to go faster. In displacent mode their hull speed in knots is a factor (usually taken as 1.34) x the square root of the waterline length in feet. I say usually because the hull design can mean this factor varies. This calculation is due to the propagation of a bow wave that a boat can't easily sail over. It takes a lot of power. In any case if you b**g in the numbers longer boats go faster and generally that is the case, which is why in rating rules bigger boats generally need to complete a course quicker than a smaller boat."
