Running up an escalator is significantly faster than running up
the stairs thou. 
One way I ensure my flight path is clear is by making obvious
stomping sounds, which most reasonably attentive commuters will
hear and automatically move to let me pass.
Finally, we are a Commonwealth society, so to the left we shall
stay if we aren't moving quickly. It is not a matter of body
strength (which as some pointed out, running up probably needs more
arm strength than just standing), but ensuring most will be
assustomed to it.
you sure significantly faster?
stairs is faster because no one is in your way.
and it will allow people to maximise the use of the escalator to
100% instead of standing one side, 50%.
because of selfish people who want to rush and don't want to
take stairs, 50% of the standing escalator space is wasted.
