Those are fair points Curtis. At the end of the day this is just a bit of fun - the idea of comparing with your claimed time is nice and the irony of "losing" by being too fast appeals to my twisted sense of humour.
Anyone else got any thoughts on this? Diablo does look to be running away with this one for venue (fine with me).
I'll leave this thread going for a few more days and then start another one for signup, and suggested "rules of the game".