Well, I don't know what to believe. But now that I see that scene, I can't see anything else but a man in a suit climbing. Too smooth. Also, it doesn't look like the shape of stop frame Kong.

Just MHO.

"I want Kong to be the fiercest, most brutal, monstrous damned thing that has ever been seen."

- Merian C. Cooper, in argument with Willis H. O'Brien.