Any decent coach is going to find ways to get inside the head of his opposition. A really good coach will be aware his opponents will expect it, yet he'll still find ways to fuck with their heads.
Every way Bernard Laporte devised to fuck with All Blacks' heads worked for him.
The bleating about doping several months ago. The reminders of the 1999 factor. The new black French jerseys (how dare they!). The kerfuffle over the playing strips (what colour are they going to wear?) The derision over the haka (seriously, what colour jerseys are they going to wear? Red? White? Blue?)
The players wearing silver and black stood there arrogantly poking their tongues out at players who were quietly self-confident because they knew their coach had already given them a chance, and a game plan that could win. (And seriously, as a couple of commenters here have suggested, isn't it time to give up the haka? There's brains over on one side thinking through what they have to do; and there's arrogant posturing on the other side chanting "Kill, kill, kill" and thinking it's going to be a walkover.)
And once the game started, Laporte's kicking game (which Laporte was careful to telegraph in advance) was answered not with intelligence and possession and pace, but with Leon bloody McDonald kicking the ball back like the braindead automaton he's always been. Did he notice we were winning our lineouts, and some of theirs, and could settle things down by kicking for territory? Did he realise that (him apart) we had a running back four who could return the ball with interest, and punish the game the French started with? Or that our forwards had dominance, and could rumble up and tire out French legs, as we should have done to start with? Did he think? Did anyone?
Did they notice in the second half, for example, that the French game plan changed in an instant (after NZ were given their half-time instructions and then switched their brains off again), or were they lulled by a first half kicking game and several days of having Laporte send telegraphs about how Les Bleus were going to play, and disarmed by a Frenchman who realised that Les All Blacks are easily needled and unable to think on their feet? When the French game breakers came on, did any All Black notice, turn his brain on and wonder if this presaged something different? A very different game, perhaps?
Did they hell -- All Black brains weren't switched on at all, just as Laporte knew they wouldn't be. This was a game in which the braindead were beaten by brains. Once the brain-fog of mourning subsides, you can only sit back and admire how it was done.