LostAgain wrote: you turn up to run a brown to find it is won in 35 minutes, barely a green.
This sounds rather far-fetched. Can you give an example of an event where it has happened? (apart from any middle-distance events that have been clearly labelled as such) In my experience, planners tend to make courses too long rather than too short. It's not unusual, for example, to find Blue courses that are 7+ km with 200+ m of climb, which is way outside the traditional guidelines. Perhaps they do this because they know the area has the potential for very few TD5 legs, but the average times taken on such courses are often very high.