the pdac is not just some show it is the biggest mining conference in the world there are investors from all over the world close to 20000 people show up. If the resource goes up significantly then pdac is the perfect political, economic and tactical venue to release it. there is a reason why there is a huge waiting list to get a spot in the core shack every company that has impressive material/ results want to showcase it at pdac. However if the new resource doesn't change much then it can happen whenever.