Hi I tried Super Stardust on my TF1260 (latest FW) and it works just some slowdown when the asteroids break, I can't say if this is normal a it's not a game I normally play.
I can say that I tried SSF2 earlier and it was running quite slow, I did not try any fixes at this point as I was actually just testing that my Joystick worked in 2 button mode =D
Also FWIW I have a really old version of WHDLoad installed, 17.2 I will need to update that
edit: updated WHDLoad to 18.5 no change