Using the lagfree CPU governor in the Performance menu gives me a notable boost in overall smoothness. Give it a go - it brings it a little bit closer to CM7 speeds - but don't expect anything as fast.
Another tip for people who find it a little sluggish is to set transition scaling (in Dev options) to 0.5x or off. Any processing lag is offset by faster transitions.
but by setting the governor to lagfree it bring the cpu at max frequency all the time. so this is decreasing the battery life