So what do your records show that the NT 3.51 Server conference in the Seattle conference center was? I have the shirt that says PDC (white shirt with a sort of greeny / gold design on the back shoulders). That was where they admitted that they were a bit to hasty in the 1992 pdc by saying theads were cheap and we should use as many as we want. They back peddled, said "not that cheap", and introduced completion points for waiting on an event instead of blocking a thread dedicated to that completion event.
A couple of speakers were late because they thought they could just drive across the bridge and got stuck in traffic.