The current implementation counts almost
shake as a step, which obviously makes
the counted numbers differ heavily from
the reality.
When not walking at all, but shaking the
device in ones hand, it counts steps that
were never really there.
Similarly transporting the device in
a car on a bumpy road will cause extra
steps to be counted.
OTOH when really walking or running the
application does not count all the steps.
So, in short it is currently impossible
to set the sensitivity of the pedometer
application such that it could count the
steps properly.
The method for detecting a step should
apparently be a bit more complex.
One should estimate the average g-force
direction and then expect some roughly
horizontal movement and a roughly
vertical stomp to count a step.