Talking with a coworker today and she said her former boyfriend, who was apparently quite the athlete and used to ride the mountains of Taiwan, use to bike commute 37 km and his best time was about 50 minutes. Yes, 37 km in 50 minutes, and we're talking about through the core of downtown a large metropolitan area.

I said this was not possible, even if he were an professional cyclist riding an extremely aero trial bike with all the stops and go. But she maintained that's what he did, and even whipped out her phone to check the distance. I didn't pursue the issue any further. There was no point.