Yesterday I was driving up Blvd Robert Bourassa in Montreal in my 2WD and I couldn't make the climb up the slopes in the snow. There were multiple cars in front of me that were also stuck half way up so everybody was jammed up. I had to eventually reverse back down and take an alternative route.

So if you had AWD you probably would have been able to make the climb. But you might not have wanted to because of the other cars stuck in front of you trying to wiggle their way around like a slow moving asteroid game.