I bought a Radeon 9600 not too long ago from a G5 owner after I saw that article. The performance is definately better. Here are the differences in Halo:
Radeon 9000:
866MHz, 1024MB
Frames=4700
Total Time=269.23s
Average frame rate=17.46fps
Below 5fps= 6% (time) 0% (frames) (16.277s spent in 17 frames)
Below 10fps= 17% (time) 6% (frames)
Below 15fps= 44% (time) 26% (frames)
Below 20fps= 74% (time) 55% (frames)
Below 25fps= 83% (time) 67% (frames)
Below 30fps= 91% (time) 79% (frames)
Below 40fps= 97% (time) 90% (frames)
Below 50fps= 98% (time) 94% (frames)
Below 60fps= 99% (time) 96% (frames)
###Video Options###
Resolution= 1024 x 768
Refresh rate= 0 Hz
Framerate throttle= No Vsync
Specular= No
Shadows= No
Decals= No
Particles= Off
Texture Quality= Medium
Radeon 9600 (vertex):
866MHz, 1024MB
-console Frames=4700
Total Time=215.93s
Average frame rate=21.77fps
Below 5fps= 6% (time) 0% (frames) (13.917s spent in 12 frames)
Below 10fps= 7% (time) 0% (frames)
Below 15fps= 20% (time) 8% (frames)
Below 20fps= 49% (time) 31% (frames)
Below 25fps= 71% (time) 53% (frames)
Below 30fps= 84% (time) 70% (frames)
Below 40fps= 93% (time) 83% (frames)
Below 50fps= 98% (time) 94% (frames)
Below 60fps= 99% (time) 97% (frames)
###Video Options###
Resolution= 1024 x 768
Refresh rate= 0 Hz
Framerate throttle= No Vsync
Specular= No
Shadows= No
Decals= Yes
Particles= Off
Texture Quality= High
Radeon 9600 (pixel and vertex)
866MHz, 1024MB
-console Frames=4700
Total Time=312.10s
Average frame rate=15.06fps
Below 5fps= 3% (time) 0% (frames) (10.586s spent in 14 frames)
Below 10fps= 18% (time) 8% (frames)
Below 15fps= 62% (time) 45% (frames)
Below 20fps= 83% (time) 69% (frames)
Below 25fps= 91% (time) 80% (frames)
Below 30fps= 95% (time) 87% (frames)
Below 40fps= 98% (time) 93% (frames)
Below 50fps= 99% (time) 96% (frames)
Below 60fps= 99% (time) 97% (frames)
###Video Options###
Resolution= 1024 x 768
Refresh rate= 0 Hz
Framerate throttle= No Vsync
Specular= No
Shadows= No
Decals= Yes
Particles= Off
Texture Quality= High
The game looks absolutely amazing with both shaders on...but it doesnt run so great (im sure faster G4/5 systems do a better job). I wasnt really expecting it to, anyway. Unreal Tournament is acting funny and won't launch (even after using the updated installer), so I have to mess around with that. My whole point is that Radeon 9000 owners should really think about switching to the 9600 since both can be bought/sold at the same price on ebay.