I don't know the bge on a personal level, but depending on the temp probe placement in relation to grate surface can be significantly different. Alternatively, the ceramic insulation may make it very temperature stable with a low swing.
Comparing my cookshack, my friends MES and another friends pellet pooper (cabelas?) We had a 20, 40 and 35 degree temperature swing on either side of the set temperature. If the BGE stays close to a 5-10 swing, it may cook that fast.
Also, I think
@corkybstewart is in France, not sure how their pork ribs compare to domestic in fat, thickness, size, but that certainly could affect cooking time.