It's my first vehicle with VDC, and it's pretty cute technology and fun to play with in the right environment. The last time I did some dirt road driving
I was very impressed with how well it worked, though it's not infallible.
Primarily it seemed to work best in a trailing throttle understeer situation. You're off the gas and turn in abruptly while going too fast so the front end starts to plow, and it feels like the system activates the inside rear brake which pulls the vehicle's path right back in line like magic. Very cool.
In a full throttle oversteer situation it doesn't appear that the VDC does anything at all, the traction control is so incredibly aggressive in retarding your throttle that there's little chance of strange yaw moments for the VDC to worry about. I find it kinda annoying actually, when exiting parking lots onto a street, if I even barely hop the inside tire off the curb I loose power for a second or two right when I'm trying to accelerate to traffic speeds
In trailing throttle oversteer (which admittedly is hard to do in this truck), the VDC seems totally at a loss. You enter a corner too fast and turn in smoothly with just enough brakes to keep the nose planted and get the rear end to slide out. The VDC didn't do squat, the truck continued to rotate and I had to aggressively counter-steer into the spin and just wait for it to slide to a stop. I guess it makes sense, what's it going to do? Clamping the rear brakes won't help, those tires are moving sideways not rotating, and clamping the front brakes will just unload even more weight from the rear tires and make the slide worse.
But all that was at low speeds on a wide dirt road, so not the best environment. I'm looking forward to having a big wide open wet parking lot in a few months to play around with it some more