Does IS help with slow moving subjects?

ARShutterbug wrote:

Image Stabilisation is an invaluable tool to increase image sharpness and improve focusing accuracy under most conditions. Exceptions include when the lens is being thrown side-to-side or rotated rapidly. None of your subject matters would demand such violent movements.

School indoor stage events: IS recommended, panning mode may be useful as an option

Dinner parties: Shorter exposure times recommended, but IS is useful when you need to drag the shutter

Award presentations: IS recommended, panning mode useful.