I agree, definitely not for heavy duty winter use. If I have to walk the 30 steps from my parking lot to the office then I just wear my "snow boots" then change out. I work out in the mornings anyway, so I hardly ever wear my shoes to the office. If the winter gets really bad here in VA I just store my shoes at the office.
Ah yes. I have a mile long walk to the subway station every morning. I can jump on a bus if it's too gross out but I prefer to walk in the morning unless it's exceptionally disgusting.