PC specs:
CPU: AMD Phenom II X6 1090T (running 5 cores @ 3.2Ghz)
Memory: 8GB (4x2048MB) DDR3 12800.
GPU: ATI HD Radeon 5870
1920x1080 Maximum + LOD + LOD Streaming: 5073, 5076
1920x1080 High: 5698
1920x1080 Medium: 7773
1920x1080 Medium - Occlusion Culling: 8082
Overall, my impression is that I'd probably be happy playing at any of the graphics settings, but am pleased to see that I could get over 5000 points after tweaking the Maximum settings a little. I'm sure I'll be even happier once I fund my next PC.
I seem to be CPU-bound when I enable Occlusion Culling, so that actually hurts my performance in complex scenes. The client never goes above 33% usage in the Task Manager, though, so I suspect that the client is only using 2 threads. That leaves my system with unused horsepower, but 2 threads is pretty normal for current games. I think the last project I shipped actually made use of 4 threads on PC, but we tried to be overachievers.
If I were willing to play with fire, I could unlock the CPU to turn off a couple of the cores and overclock the remaining ones... but I'm not keen to do that, anymore than I'm keen to overclock the GPU. It's just not worth it.
Here's my experimentation in a bit more depth:
1920x1080 Maximum: 4760
+Occlusion Culling: 4274
+LOD: 4963, 4958
+LOD Streaming: 4490, 5033, 5029
1920x1080 Maximum + LOD + LOD Streaming: 5073, 5076
1920x1080 High: 5698
1920x1080 Medium: 7773
-Occlusion Culling: 8082