The information given to me at the last NDN in Victoria, where I gave a public pep talk for NDN15, was pretty clear as to what sort of track the sprinters liked, all included in a written report at the request of the PreZ ZCCQ. Went to a fair bit of trouble to do all that so I have a bit of a vested interest in what's going on and what circuits are going to be used.
C'mon Aub, you are a member of the three member NDN committee so you are much more than just a mail man.