I haven't done any pulls on a track lately but I definitely notice a difference when I open it up and traction is on vs off. I only notice it kick in when I am really swaying and trying to get the power to the ground otherwise I don't even know its on. When its off, I have to manually correct and am all over the place
Like you said, it does quite a lot without you knowing its helping you out
I haven't done it with snow tires though, don't need them down here
I haven't done it with snow tires though, don't need them down here