It doesn't make any sense to compare AI to this single modern human being who is already innately intelligent. It makes more sense to compare it to the whole of human/ape evolution, and maybe we're limiting ourselves too much by always looking at humans on an individual level.
I think we need to find a way to imitate human evolution, selective pressure/natural selection, and human limitations - in whatever form. Hell, give networks some form of reproduction, limited lifespans and limited communication. Throw in what the other commenter said about gaining knowledge and applying that to and manipulating a "real" world (I don't think it actually has to be real, it just needs to be an environment where changes can be made that have some logical/causal effect), learning from experience and whatever other feedback loops we seem to have. Maybe AI will evolve itself into being given the right environmental and personal constraints.