Apparently, they play tag rugby up to 13 and everyone is encouraged to pass the ball all the time.
There were hardly any scrums in the first half - they just keep moving the ball all the time. Hardly any breakdowns for the all blacks. Contrast that with the Lions going from slow, ponderous breakdown to slow, ponderous breakdown.
Thing is, the Lions didn't play badly and would probably beat any other team in the world - it's just that NZ play a different kind of rugby.
Before this match, there was talk of how the Lions should slow the pace down and control the game. That'll never work against the All Blacks - teams will only beat them when they outplay them, which means being faster and as irrepressible as them. Their fitness, passing out of tackles, ability to move the ball, change the point of contact continuously, these are what have made them, for the last 15+ years almost unbeatable.