As I understood it when it came out, the crossplane R1 crank design was intended to smooth the inertia of the moving parts in the engine and smooth the angular velocity of the crank, over the cycle. The resulting more constant angular velocity of the crank makes the force powering the wheel smoother and more constant. The smoother force output has smaller peaks of force that the tire has to manage. The peaks are the point where the tire begins to slip when on the edge of the tire's traction, so lower, smoother peaks means more traction when putting down power.
Applied to a triple, this is definitely marketing. Making a triple with anything other than a 120 crank would be a lot heavier to balance among other things. Maybe they came up with something awesome that none of us are great enough to think of, but probably not. They're jealous of our style.
aand I just realized all of that was covered in the linked articles
Last edited by pyroking339; 10-19-12 at 00:10.