My family and I were there and made it on to the hill - just after lining up before 9 AM. The crowds at the Bank Street security area were mostly patient but people started to cut into the line about 11:30. Those who had been waiting called them out and they were taken out of the line. Even after making it through the final screening we were prevented from entering the Hill for 10 minutes while the indigenous ceremony was held at the Centennial flame. People were frustrated as no explanation was offered. However, it is a no win situation as if there had been an event people would have blamed lax security. Unfortunately this is the world we live in. People were warned to arrive 3 hours ahead of time and even then it wasn't enough time. There should have been a third entrance but the Bank St entrance was better than O'Connor which was chaos all day.  The security perimeter was tight with heavy equipment (dump trucks, graders etc) blocking the streets leading to parliament hill.