The VYC Yardstick is measured from average results for a class over many regattas. With classes such as the A Class, F-18s and Tornadoes the top of the fleet are world champions and full time professional sailors. Those at the back end of these fleets if racing in another ‘less professional’ class would be showing good results in the other classes. The fact is that the average skill level in classes such as the A Class, F18 and Tornado are much higher than classes like the Mozzie, F-16, Maricat, Windrush, Cobra, Stingray, Nacra. Therefore if yardsticks are measured from average fleet performances, than a sailor of equal skill level will have a better chance in the Mozzie class for example than the A Class. Handicap racing is not perfect and also benefits different boats depending on wind strength and course. This is something that you should just deal with if you wish to race yardstick. Or you can go and play in OD or Formula fleets.
Just my 2c