This is pretty sweet! As I commented on the video itself, I'd have liked to see this in a '98 or earlier van with the viscous t-case. This one performed really well though.
My daily driver is an AWD Suzuki SX-4. With the stability control electronics engaged, it is actually scary to try and drive fast in slick conditions. Much better when the stability control is disabled, but the AWD works with an electronic clutch and if it gets got, it quits working. (I haven't pushed mine this hard, but this is what I've read on the Suzuki board.) My old Safari is by far my favorite AWD for slick roads.