I have a VT Clubsport (that I rarely drive now I have my van) and found the traction control useful in the wet on tar, but have never experienced it on dirt. I remember one occasion I was driving in the wet and my left wheels were caught in a deep puddle that would normally pull the steering to the left. Before I had noticed it, the traction control sorted it out and kept the car straight. I'm not normally a fan of modern gadgets on cars, but that incident could have been a pending accident.