I agree Vic if you have small fleets grading would be difficult. I guess its up to the individual pilot or clubs to strengthen their fleets by sharing information and coaching their members.
I also think it depends on the class of yacht being raced. I bought my blokart before I had even seen a mini or class 5 yacht. The blokart is great for racing as everyone has the same gear. If you like the design and building go into a development class like the mini.
Looking at a developmental dinghy sailing class like the International moth You wouldn't buy an 1970's model scow type moth dinghy for $400 and expect it to beat the latest and greatest hydro-foiling moth $25000.
I was lucky when I first started land yachting I had some dinghy/catamaran racing experience and after one intensive tuition from the land sailing guru I was starting to make my blokart perform.
There is a lot more to winning a race than having the fastest/ best designed yacht. I look at racing with a holistic approach that can be broken down into three broad categories.
1) Yacht Speed- equipment(yacht design), rig set-up, trim, technique and personal fitness
2) Yacht Handling- standard manoeuvres, mark rounding manoeuvres, starting manoeuvres, close company manoeuvres
3) Tactics- weather, strategy, tactics and rules
In your local fleets you know the guys and their particular strengths/weaknesses so if individuals and clubs want to improve they will by sharing, coaching and mentoring.
The winners need people to beat too and I can only imagine it would get boring at the top with no competition.
Who shares wins.
BenBoulder