Well, quality helps... But the snow was sticking to the traditional metal shovel, and the plastic ones were (a) lighter, and (b) moving the material... We settled down to three guys trading off between two shovels... Took the top foot off the snow, down to about 4-8" or so, working out that the vehicles didn't "plow up" to high center, and then called it "good."
The 4x4 van has standard tires, but just flat out goes... The Mercedes hasn't been out yet. My 2x4 van hasn't been out yet. Arne's van has studded tires, so he pulled it out when we cleared some space. The 1970s Buick Regal has been out, but it's got monster snow tires on all four wheels, with the rears studded...
Oh yeah... I -love- my Carhartt canvas insulated overalls...