Six-handed play is a format that encourages aggression. It requires players to push slim edges harder and farther than they would in regular nine-handed play, simply because it is less likely that anyone has caught a premium hand or a piece of the board. Thus it should come as no surprise that 180 players (about 15% of the field) have been eliminated in the first 90 minutes of play.
Unlike Event #2, when players seemed to relax after about an hour and to become more chatty and friendly with each other, there is still quite a bit of tension, and not much chatter, at the tables.