At best are the same speed as every other ship.
Every time I sail directly in to the wind away from a brigantine or galleon the distance between us does not increase. At best it just keeps them at bay for a while.
If anything shouldn't a sloop should be faster with a tailwind as it can utilise 100% of its sail? Whereas the brigantine and galleon only the rear most sail is being fully utilised. Wind to the front sail(s) is being blocked by the rear.

