You might. Keep in mind that PHRF ratings initially stem from boats with similar specifications that can thereafter be adjusted by the local board according to actual observed performance.The fairness of a boat's rating is not inherent; the fairness of that rating comes from the relationship of that boat's rating to the rest of the local fleet.
Very good point. So (hypothetically of course) you would imagine that if you had a boat with a delta to a well known benchmark boat that was the same in two neighboring regions there would be a very good chance in a third region (an immediate neighbor with identical conditions) it would maintain that delta or at least be close. Correct?
So it's very possible that a benchmark boat fully optimized and sailing with professionals who've been in the boat for a long time could have an inverse rating to a different benchmark boat sailed in a different but neighboring region which is also fully optimized and sailing with professionals who've also been in the boat for a long time.
I did a calculation a long time ago that a professionally crewed and optimized boat would generally outsail its competitors ratings by about 20 seconds a mile.and therein arises the argument about golf handicaps - fair or not?