Typically, we're around 360lbs and sometimes as much as 380lbs when sailing double handed and I just can't see putting that much beef on an F16 and expecting to be competitive across the wind range.
I like sailing the Viper heavy, you do lose some in the lighter stuff, but you gain so much when the wind is up. The best I've ever sailed we were 385lbs at F16 Nationals in Gulfport. Anything over 15kts as long as we had clear air, we owned the fleet.