Is it because you don't have to stopto punch or the setting is too easy?
Don't have to stop. I should be comparing to Metro, not NavDash, which is always going to be slower due to the more complex nature of the map. Metro takes longer to punch, hence why the fastest I've ever done a Metro course is I think 4:08min/km and that was probably going harder than I was today. As soon as you stop the time blows out - check out my lightpole-O rides at 20kph (I smash it between CPs) when a casual ride on the same bike is 8-10kph faster!