FFF,
I certainly think that if you land in water the size of the Atlantic, I am sure it would stop a Tiger Moth. The amount of standing water you get on rumways in this country certainly won't stop you any quicker, although we do have grooved runways now which to improve braking in the wet. According to JAR-OPS a 'grooved' WET runway, is classed as a DRY RUNWAY for performance calculations!!!