Spend 3 hours or so researching the links between Savants and Autism and one is likely to wonder if autism is a form of brain overload.
It seems to me that some/many savants have a brain that has not evolved enough to handle the bandwidth. Kind of like throwing 50 amps over speaker wire. But many other savants have proven that there exists inside the human brain the ability to function at a level many times beyond what the best average brain can deal with.
My point is that the brain has the ability to do so much more than it does now and in some rare circumstances it is given the opportunity to demonstrate it and in even rarer circumstances the owner of the brain is fully aware of his or her own capabilities.
I think there is a valid comparison to reported instances of extra sensory events or perceptions. There are documented instances of things that modern science can not explain. (not that organized religion can do any better or worse)
So does it not seem logical that if our species is given another million or five hundred million years with a habitable environment that we would not likely evolve into something much more mentally able then we are now. And given 500 billion or 5000 trillion could we not be on the edge of an evolutionary step that we can not at this time comprehend.
There is no reason to think that evolution is a finite process. What we do know for sure is that someday our sun will go supernova and a habitable environment on the planet earth will be gone forever. Where our species is, (if by some miracle we even still exist as a species) is up to us, and time is running out before it is too late for us to make the changes that need to happen if we want even a 1 percent chance of our species surviving our sun going supernova.
So to summarize my point for easier reply, it is my speculation that the multitude of reported instances of Savant like ability and extra sensory abilities likely contain some true instances of the human brain being able to do things that science can not explain at this time. I am fully confident that someday science will be able to remove the mystery from these anomalies.
My second point is that evolution must be considered an infinite process when given the ability to escape the eventual natural destruction of our planet, our solar system, our galaxy, and our infinitesimal little pocket of space and time that we call our universe