It's all relative. Despite the colder climate, Canadians cycle about three times as much as Americans. There was a very interesting study done recently that compared cycling in Canada and the United States and attempted to identify the causes for disparity. The differences appeared to be the Canada has tended to adopt policies that encourage cycling or conditions that are conducive to cycling. It's a very interesting study and I recommend reading it:

http://www.policy.rutgers.edu/facult...icyArticle.pdf