I discovered yesterday - during my 3+ hour / 20 mile commute here in MA - that the NAH with the Blizzak snow tires is unstoppable. On inclines of packed ice and snow the NAH was able to keep going even if starting from a dead stop. Many others couldn't - probably with all season tires - and were the reason for the 3+ hour crawl getting home.

Edit - I should add that the standard stability/traction control also had a lot to do with the NAH's ability to keep things moving. I could see the light flashing and feel the system controling the power to the wheels.