Not just against wood, actually I haven't seen how they did the wood bit - however the new values for zombie block damage seem to be a lot better. The following list has the attacks zombies can do, from the b199 file and the b208 file - note this is block damage only not entity damage:
meleeHandZombie01 - old: 20, new: 16
meleeHandZombie02Feral - old: 40, new: 32
meleeHandZombieCop - old: 250, new: 200
meleeHandZombieCopFeral - old 500, new: 220
meleeHandZombieFeral - old: 40, new: 32
meleeHandZombieFootballPlayerFeral - old: 40, new: 32
meleeHandZombieHazMatFeral - old: 40, new: 32
meleeHandZombieStripperFeral - old: 40, new: 32
meleeHandZombieStrong - old: 50, new: 40
meleeHandZombieStrongFeral - old: 100, new: 80
meleeHandZombieWorker - old: 100, new: 80
meleeHandZombieWorkerFeral - old: 250, new: 200
You can easily see from that the zombies you should concentrate on for horde night, they definitely have a couple a tank zombies there.