Yes, we walked it many times during our December visit. Took about 10 minutes.
Do not approach the walkway from the boardwalk itself, but go outside at the stairway closest to your room, on the pool side of the building, and go from there . . or. . .
Take the hallway to the stairs furthest from the elevator, to the exit near the tennis courts. Exit towards the pool side,and you are already beyond the quiet pool and well on your way to MGM.
Those with rooms far from the elevator, overlooking the quiet pool or the tennis courts, are rewarded with a short walk to MGM.
The walk is quiet, peaceful, and at night is especially beautiful. A nice wind down after Fantasmic crowds