Try to overclock your phone up to 950Mhz (with kernel power) and also install "Theme customizer" (with fast transitions).

Those are the two things I do as soon as I reflash my phone.

With stock kernel, it does feel slow, but after the two updates mentionned above, my phone feels so much faster.

Good luck.
NB : also try swappolube, it doesn't hurt.

Reno