Tapered tangs do reduce tang weight. You can also reduce tang weight by drilling lots of holes in the tang to skeletonize it. (I do both.) The result is that the balance point of the knife is moved forward. Unless you have a long blade, a full tang knife with handle is going to be handle-heavy, the balance point will be in your palm. To me it feels a little like a shaped rock with a long, pointy protrusion. Reducing tang weight lets you move the balance point forward up to your index finger. I think this makes the blade feel lighter and makes it easier and faster to move the blade because the knife now pivots around your index finger instead of in your fist. Some people like hefty knives and think that means strength. I like lighter knives that feel easier to manipulate because I think a knife is a cutting tool, not a pry bar.