Turns out they were right , 26 miles is a long way!
If you want an idea of how running 26 miles messes with you head, it interferes with your ability to do basic maths. There were 10 drink stations on the marathon, each serving water in 200ml cups. Like everyone else I had 2 at each station. Then after the Finish I downed 4 more, then at the car I drank a 500ml bottle of Mountain Dew. To my marathon addled brain that means I just drank 5.3 litres of fluid. That can't be right, can it???