I am 70 and I don't think old farts like me should be given any special consideration. Starting old folks ahead of the rest is the wrong thing to do especially for this race. It would be interesting to see a plot of finish time versus age and a plot of those who DNF in 2012 versus age. I think older people tend to do well in this race (relatively speaking) because speed is not as important as endurance (6 hours) and properly pacing oneself. I do not think I could run 2:30 half marathon, but I finished the PPA under 6 hours in 2012.