Comment by JoshTriplett

> This counterintuitive result is all thanks to the rebalancing step where every 5 seconds, the system re-optimizes each elevator's path. The kiosk enforces rigidity, you must get in the assigned elevator.

Sounds like destination dispatch would work better if it didn't tell you which elevator to get into until the elevator arrived.

EDIT: already being discussed in the thread at https://news.ycombinator.com/item?id=49125423