I agree, Jim. I usually prefer my bindings mounted such that the center of my foot (beneath my tibia) sits over the narrowest part of the ski, which makes pressuring the sweet spot easy just by standing in neutral balance. That usually puts my boot (average size, 305mm sole) on or slightly (1-2cm) forward of the factory mark.
This spot comes after much experimentation, and it works for me. I am fortunate that most of my skis are mounted with Vist Speedlock plates and bindings, which allow easy adjustment of binding location. A "dead"-feeling ski often springs to life simply by moving the bindings a little.