How much free space do you have left? There is no benefit to moving apps to sd other then freeing up install space.
Settings, SD card & phone storage, Available Space.
What is considered an "acceptable" amount of free space, out of curiosity? I have 31% free but I don't have any issues as far as lagging, freezing, etc.
Once you start to go below 10% I would consider moving stuff to sdcard.