Um, I live in Montreal and we get tons of snow everyear. The Mazda3 happens to be one of the most popular cars in Quebec and I've had no problems driving it in the 20 cms (~5-6 inches) of snow yesterday. Albeit I have some decent winter tires, but I find the car handles very well and predictable. I've been driving in the snow for 10 years now, and have driven a Mazda 323 (no winter tires, first car), Dads Camry (all season) and my Integra GSR (winter tires) and the Mazda3 is as good as the integra was. Once the Mazda3 gets going I gind the weight really does well in the snow. The only downside I'll admit is a little slip upon initial acceleration, but it has been VERY icy here too and the winter tires I got on the 3 are not as good as on the Integra...
Over all a thumbs up to the 3 in the snow!