The upshot so far is that both patches show that performance is most noticeably improved at the lower resolutions (640 X 480 and 800 X 600.) At this point in time, the Quake 4 1.0.5 patch seems to offer some more performance improvement over the Call of Duty 2 1.01 patch.
In any event, the test results reported by Elite Bastards somewhat reassuringly mirror the numbers obtained earlier by AMDZone when they tested the dual-core patches for Quake 4 and Call of Duty 2, so it likely isn't a mistake in testing methodology. Of course, it should be noted that both AMDZone and Elite Bastards benchmarked the games with Athlon 64 X2 / NVIDIA GeForce 7800 GT systems, and the Call of Duty 2 1.01 patch, in particular, is specifically aimed at Intel dual-core HT processors.
Hopefully, performance will continue to improve as subsequent patches are releasedespecially at higher resolutions. You can try the Quake 4 and Call of Duty 2 dual-core patches yourselves and report your results.