I have noticed some speed troubles with the game Advantage Tennis, using the latest WHDLoad slave. On both my Apollo A630 and blizzard 1230, the game plays lightening fast, way faster than the plain floppy game on an A500. But on my Apollo 1240, it is really slow, slower than normal. On the Apollo 1260 though, the speed seems correct according to the A500.
Anyway, i prefer to play it fast, it is more challenging and the "to serve and to volley" style becomes quite spectacular.