This looks like a lot of fun, Kevin. Great experience too! I'd love to get a GX out in those conditions.
I would personally be interested to see how an RX or NX AWD would fare against a GX in these same tests. I know there are a lot of variables between unibody and BOF, but the difference between Lexus' Dynamic Torque Control AWD and full-time 4x4 would be interesting to see here in a stress test of sorts.
Did they have RXs or NXs available to drive?