Yes, but RM is not important in lightwind which Greg was careful to focus on. So his statement is still basically correct.
Wouter
Agreed, but at that point a team at 130kg sailing a F16 down to weight will be carring 18 kg less around the course sailing a Viper.
Carrying 18kg extra around the course (same crew sailing a boat at 125 kg vs 107 down to weight boat) cannot be good for speed !