If you really want to have some fun that you must go the the A-cat forums and point this out to them. You will get a roar of protests, that the A's can sail to those ratings. You won't hear the end of it. If you really want to make friends than you should protest A-cats under Texel or ISAF for using to slow a rating. It is a pretty wide spread trick to up it one or two points. And sometimes the RC's and rating committees are helping a bit as well. For example the A-cats are the only boxrule class on which the class rating is calculation on a few measured boats instead of class rules. If you use class rules than the rating. F18 on the other are assigned a number on their maximum class limits. Rating the A's fairly is a problem and the RC's know it. I've seen A-cats listed at 102 while 99 would have been the number given by the formula.
It was actually one of the reason why I designed and implemented the NMBR system. To (also) solve this A-cat problem.
101-102 (Texel) and 100-101 (ISAF) are more fair to the A-cats then the true theoretical values produced by the formulae.
Wouter