Just started commuting. I was initially going 10.5 miles each way and taking about 50 minutes but added another 2.5 miles for a better route. I'm now at about an hour average, +/- 15 mins depending on conditions and I'm happy with that. However I leave home 1.5 hours before my shift starts to factor in clean up/changing time. Not sure if this poll considers such things as preparation. Either way, the extra time on the bike saves me time otherwise spent on exercising later in the day so I think I come out on top.