You will always get logs from the tree at the same rate but that is not the problem here, the problem is that with more people the chances that the tree will be cut down are far greater, as icebox has shown in his original post. Let's move onto these 5 players cutting the 5 yews, if they all cut their own tree it would be be inefficient, I'm not disputing that. Now you move onto when these 5 players all start on the same tree and work their way around the tree grove as they fall, always being at the same tree. When they are done the first tree will be spawned or close to it. Fine, very little wasted time there but you don't take into account the time used in moving to different trees.Although this time would be minimal, it would add up into minutes, and then hours. If you had these yews alone you'd still get the logs at the same rate but the chances that the tree will be cut down are far fewer than with 5 people, this means you can stay at the tree longer (getting the same rate of logs as with 5) and this means less time spent moving to a new tree. As stated earlier this time would be minuscule but would add up. Thus I conclude that there is no practical reason to woodcut with other people, unless you'd like the company. Event the company argument can be discarded since there's clan chat and always the friend's list system. Even if you have trouble making friends, like icebox certainly does, you can always drop into a "public" clan chat.