The issue for ISAF will be... what is the optimum weight for a two up viper... It sounds like they have had 5 knots in all of their races, so they would be above any wind limit.... Some argue the optimum for a 16 footer will be 260 ish... for obvious reasons the class would argue that the optimum is closer to 310. The jury is still out.

The optimum for the Tornado and F18 class boats are pretty well known... As Vipers go through ISAF trials...events like the USSA championships will be analyzed to figure this key point out.

Olympic sailors know the average wind at the ISAF gold cup events and since most have to score well at these to qualify their country and win their countries slot.... they will want to be at optimum weight.... if the Olympic venue is a big wind place... they know they can bulk up.