Escalade = terrain difficile ?

Tout est dans le titre, je me demande si on doit diviser par deux le déplacement maximum lorsqu'on réussit un test d'escalade.

Livre de règles (eng), page 30 :

CLIMBING
When faced with especially tall Obstacles, the likes of a rock face, a tumbledown
pile of statuary or raised scaffolding, a Climb test is often in order.
The major difference between jumping and climbing is whether a model is
attempting to increase its altitude by more than its own height.
When a model attempts to make a Climb test, it is important that there is some
way for it to scale the surface – handholds, jutting rocks, wooden crosspieces,
and so on. Whenever a model climbs in this manner, they are moving through
difficult terrain (see page 26). Areas that do not have these are considered to be
unscalable (see below).
Making a Climb test is simple. Move your model to the bottom of the surface
you wish to scale, roll a D6, compare the result to the Climb table on the left
and follow the instructions given.
A model may climb a surface or Obstacle of any height, provided that it is
scalable (see below). Cavalry models may not make Climb tests.