My commute was 25 miles each way, 1400 feet (426m) of ascent each way, with no transit option. Last winter, a surprise blizzard rolled in during the week. My ride home took me 2.5 hours, rather than my usual 1:40, but I managed to stay upright the whole ride despite riding on slicks. Fixies and foul weather, better together!
1:40 back and forth with a fixie every day ? Damn.
Climbs like a mountain lion, descends like a brick. My average speed over distance was 1.9 MPH faster on the fixie than on my geared road bike, even with the severely capped top speed. Also a lot cheaper to maintain given the 250 miles per week.