I think you missed the point of the post.
THe 'slow and steady' racial ability of dwarves needs to be modified. I can see a group raiding an entire castle and placing it all on the back of the dwarf. Since he can keep moving it only makes sense to bring one dwarf who can carry so much stuff and then pack it all on the back of the dwarf.
As for the planescape comment, I am thinking of any player that has a dwarf and then grabs the world s/he is holding onto, opening a portal to a different plane and taking the held world (because s/he can still move just fine) into the different plane, and then becomming a god/ess.
Slow and Steady sounds cool, but it makes the dwarf a bag of holding with a battleaxe.