ORIGINAL: gboulton
My own personal "short answer" would be "Heck yes..lighter ALWAYS flies better"
This is why this is so subjective. Personally, I prefer a heavier plane. They handle wind better and are not so "Floaty". A few years back I build a very light version of the GP Ultra Sport. I flew it twice and haven't touched it since. It just doesn't fly as well as either the original, or the ones that I fully-sheeted the wings on (Read that as MADE THEM HEAVIER).