Perhaps it will depend on which comes to the top of the recently list. I think people go for the top of the recent list and post to the first one they come to. In that case, posting later is to your advantage.

Rothbardian_fanatic

Zapping More Might Solve Our Leader Board Wizard Issue

Undisciplined

There will likely be more duplicates in such case, indeed. Good point. But more often than not, people favor the one that was posted first, so the second one (from the poster who tried to optimize posting time) will disappear into oblivion. That's the risk one takes by not posting immediately.