> its still rendered by the GPU (via 2D instructions). There is a significant
> speed difference there betyween a portable 9700 and a desktop 9800XT.
> I'm fairly certain that could be measured in side by side comparisons.

I doubt this has any significant bearing on the issue described in that other thread. The hard part is the calculation of the colour value of each pixel many times a second, which is done by the CPU. Once all these values have been calculated for the relevant screen area, sending those values to the GPU and have them displayed in the right spots accordingly shouldn't make any significant difference between the R360 and the RV360. That's my layman understanding at least.
Btw, it's funny that I only now realize that the Mobility Radeon 9700 has the same GPU as the "desktop" 9600XT (RV360), not as the "desktop" 9700 (R300). Confusing.