Here is a Fancy Benchmark I put together in a day or so. I wanted to test the recent improvements in jerkiness on both C2 and on the browsers. It's a bit heavy with many sprites.
Mildly interesting find:
On a high end rig (linux xeon workstation with a quadro K-Series Graphics card by nvidia) with latest drivers under chromium 40 (that's basically chrome, just the open source build of it) I get a fixed 30fps frame rate at startup. If you go fullscreen it goes up to 60fps and then stays there when I switch the browser back to windowed mode. The 30 fps also does not look glitchy but perfectly in sync. Is there anything special you did to lock at 30fps or is that just a random thing happening?
In the past Ashley tried to implement a regular 30fps mode, but this failed somehow for a reason I have alrady forgotten and it was thrown out shortly after.