The French don't have weight in the pack, but they've always had strength, speed and skill. I think Dusautoir is underrated (except by the French), and likewise many others in their pack. Pop one ball out of a tightly held situation and the French will have it and move. Can NZ really rely on a tight game? Historically NH teams have won in the pack and lost out in the backs when playing SH teams (1991 final, anyone?), yet this is why France have often had the better of the All Blacks, having a pack tested against England, Ireland and Wales, and then those skilful backs. Unfortunately they have also been destroyed by them, on those days when they decide they can't figure out what they're doing.
So I'm not so sure that NZ will play it tight. What they will have noted is that 9-10-12-13 for France ain't particularly world class. Run Sonny Bill up through the centre channels and keep the French central backs out of position so they can't maintain a defensive line. Do that for thirty minties, rack up about forty points, and then settle in to a tight match. 
France? Quick hands to Clerc and Medard. Get to the breakdown before the best back row in world rugby (debatable...), and see if you can't get them to commit offences (and be noticed doing it). Then kick your points. Keep stretching things wide to keep the play broken, and launch through the gaps. Mostly, however, try to run with the ball!
I do hope it's a good match, even though I can't imagine it. Is that still because of residual feelings that the Welsh should be there?