From what I understood this is done on luxury vehicles and sports cars NOT for traction on ice... but to prevent torque steer when you FLOOR IT! Its for racing around curves at high speeds and tearing off from intersections so you can show off the HIGH speed handling and acceleration of your car that is "high performance".

I don't think I've ever heard anyone at those companies claim they did it for ICE or Snow. I don't floor it on ice and I don't accelerate heavily either. I suspect thats why I've never ended up in the ditch when driving in the snow and have never encountered torque steer issues in snowy conditions.

On the contrary... most of those same rear wheel high-performance vehicles tend to fishtail themselves like mad every time you try to move forward or climb a small hill from a stop. My brother won't even drive his camaro in the winter because he can't get it back in the driveway because of no weight over the tires AND admittedly low profile wide tires. On the other hand his FWD VW Golf does fine.