At every model railroad show that I attend where I show NTrak modules, there is always someone who asks how fast the trains can run. I always try to operate at prototypical speeds, but there are a few times when we put out our TGV and Shinkansen models and turn the throttles to 11. At Trainfest every year in Milwaukee, there's a Lionel operators club that sets up this train race layout and invites kids to run the trains fast...
It may not be prototypical, but I don't think any of the kids were complaining about prototype accuracy here.