Next up on the list of things to test: RTCW. I don't know of any demo benchmark to do there, so I picked a place on the first map which didn't seem to fast. I saved the game there, and then used the FPS counter at that exact spot to compare MorphOS 2.7 and MorphOS 3.0.

MorphOS 2.7: 27-28 FPS
MorphOS 3.0: 51-54 FPS
Speedup: 90%

So in RTCW, MorphOS 3.0 is 90% faster than MorphOS 2.7.