Come on Rick

The PN Ratings assume that you have a viable One design Class where the boat is optimized by the top sailors in the class. That has not happened in the US F16 class... They have a class schedule with one or two events... sort of. The underlying assumption which is a bit of a quality control for the PN Ratings simply does not exist for the F16 Class Rating.

Secondly, Portsmouth assumes that the top sailors in the three to 5 racing classes are comparable and that racing between classes generates data which is more or less sailor independent. (You also need an actual race with this level of sailor competing.... a whole other problem/limitation)

A quick check of the sailors tells you that ain't so for the F16
A class, Lars Guck and Pete Melvin... (among the tops in the world)

F18 class, the only nationwide spinnaker racing class in the USA and Canada and the older N20 Class have sailors who have won past national or Alter cup Titles.

Nacra F17 class... Bob Curry leads a strong group of Michigan sailors who have raced at the national level on this and other boats for years. Curry has several NA championships on his resume.

F16 class.... ah no!

Fact of the matter... the accurate F16 rating is darn close to the F18 rating in the EU and Australia.... Wouter was correct years and years ago and the evidence is in the current ratings in the EU and Australia.

Your conclusions based on the tradewinds results are off for these reasons.

The changes in the US Sailing scene are a major reason for moving to a measurement rating system (ISAF or Texel). It's on the agenda for the USSA Multihull Council Meeting.