It does appear to have an odd attitude, but considering lateral resistance and the fact it is powered up (flying two hulls) there is little evidence of imbalance from the rudder(s) and the crew don't seem to be fighting with the boat. Looking closely, most of the spray appears to be a 'bow wave' with some interference from the foil but the flow at the stern looks quite clean for the speed. Also the refit suggests it isn't an original design fault.
http://www.cammas-groupama.com/en/trimarans/groupama2/actualites_groupama2/actu_groupama2_19.jspCheshirecatman
