We in Quebec, by law, have to have winter tires on all wheels from Dec.15 to March 15. Even with that, the driveability also depends on the temperature (salts stops melting at 0F), the amount of blowing snow, the amount of slush, and the actual snow/ice cover. It also takes a different set of reflexes - and usually it takes up to two weeks after a major snowfall before people adjust their driving habits. Plus, some people continue to live in a sunshine state (the mental version), and take two or three into a ditch with them from time to time. Therefore, I can be sympathetic to those who have difficulty with snow - it takes some adaptation to be able to drive in the stuff.