Same here. My old Wagoneer NP229 has a VC that I used a lot on steep, icy hills back in CO. I could feel it work when a wheel started spinning. I could swear I get the same sensation in the LC but don't have any empirical data.
When I was a kid, my family had an old school (1980ish) Wagoneer for awhile. My dad went in a hunting trip with friends and had to tow everyone else's rig -- including a 4x4 truck with a trailer -- up an icy hill. The Wagoneer (Quadra-Trac) was the only one that could get traction!