World in Conflict, from the data, really looks like we had Vsync enabled, the system was severely CPU limited, or the framerate cap was on. However, this was not the case. These data points had minimum and maximum framerates extending from ~30 to ~160 fps, and there appears to be another factor in the resulting data looking so flat between resolutions.
(tested with 2x
Intel Core 2 Extreme QX9775 @ 3.20GHz)