Rudder,
Exactly so.
Point being, in neither case can you tell what is gravity and what is acceleration without referencing the planet. In both cases any physical interaction will be identical to being in 1g on (or not accelerating wrt) the Earth.
PBL seems to insist that because of causation, they are not the same thing.
I'm not saying he's wrong, but it does seem that that defies Equivalence, which is quite defiantly still a current concept in physics, being one of the principles of GR.