Anyone here who knows anything about breeding, will quickly tell you Efficient is not a stayer's fetlock. It's breading suggest a genuine 1600m horse. If it can get sit and sprints in longer races it can win them.

OK if the Cup is just a slowly run sit and sprint, ANY horse can run 3200m but in any truly run staying race, Efficient and several other runners in the Cup would end up a very long way from the winners.