Anything within 2 hours of Colins time would be completely amazing to me! There were many times when I was picking my way along wondering just how on earth he (and his pacers) kept up such a blistering pace. Having dry underfoot conditions and the ability to see where you were going would have helped enormously, but even so, some bits of the route are incredibly rough. I think 8.5 hours is a very good reference. Anything under 8 is exceptionally good going.