I won't deny what you say here. But I think that one also has to factor in whether the bow-user in question has a weapon focus on only one type of bow, but not the other. For example, if you have a charcter with the WF Adventurer but not WF Peasant, he'll have a +6 accuracy on his warbow, but not on the hunting bow. And in this case, it seems that it wouldn't be all that wise to throw away a parfectly good +6 acc bonus, just because you find yourself in a situation where a hunting bow might be a little better, if not for the WF issue.
Ofc there are many things you have to consider, I only wanted to check how the weapons compare when you're just shooting basic attacks with everything else identical. It can be useful for determining what type of weapon focus you want to pick though.
Sadly the description is wrong, it's only 20% extra damage. Hunters would be really strong with +20 damage per hit though.