I ended up doing a few calcs with a spreadsheet on some currently available planes. It seems to explain why bigger planes fly "lighter". If you are familiar with a given group of planes, say 50cc class planes, the wing loading number may be sufficient, because you aleady know what is a high wing load. But if you try to apply that same wing loading criteria to say 100cc class, then the simple wing loading fails. These planes have higher wing loading than the 50cc planes but have similar or less WVL.

Unfortunatley, my GP Yak don't look so good in comparison [&o]. Even if I lose a bit of weight it doesn't seem to help a whole lot. The money I could spend reducing weight I could use to buy a new plane with bigger wings.

I think if you are simply discussing the problem, then WL is OK. But if you are about to shell out some bucks for a new plane, or trying to get a better handle on an existing planes limitations, then doing a little extra calculating is worth while. Acually I set up a spreadsheet to automatically calc both WL and WVL by just inputting the posted vendors WA and Weights.