Patterns Of Gorilla Intelligence And That Of The Other Great Apes

The use of tools in the wild by chimpanzees has been observed and well established for some time now and in fact recently chimps have also been observed successfully hunting lemurs with crude yet self-crafted spears. On the other hand tool use by gorillas in the wild has been little observed and certainly not to the same extent or sophistication as their more rambunctious cousins, the chimpanzee. So then do these observations lay to rest once and for all the age old quandary about "which species of ape is second to man in intelligence"?