It's useless to try to judge that pace. It depends on the terrain, which is hard to get a feel for from afar. We can assume there's elevation and uneven terrain

It's useless to try to judge that pace. It depends on the terrain, which is hard to get a feel for from afar. We can assume there's elevation and uneven terrain, but to what extent? But first out of 500 ultra-marathoners from 12 countries means it's probably a very good pace.