I really started to notice it when I moved from Indiana (UTC -5) to California (UTC -8). The threads and comment scoring seem very different depending on what time zone you are in.
From the East coast, in the morning, you pick up the late UK threads and comments, and at night the late afternoon California threads. From the West coast though, in the morning you catch the East coast threads (already in full swing), and at night, things die down a bit before the few Asia posts start to pickup (I stay up late).
It's strange how one site can have a few different feels based on who happens to be awake in the world.
If the point to such service is karma whore-ing, I suppose it's "lame".
The point is it's very hard to know when the service is active or not, and when something should be posted to be (potentially) read by the most, to be fully efficient for the community.
I have no doubt that if some post doesn't provide any interest, it won't be up-voted. So, even if such "tool" is used, the power of it is kind of relative.
then again, i don't read the new queue either, so i guess i can't complain. maybe reddit's system of posting a different article from "new" in a box at the top of the page every time you refresh it would help fix the problem.