You can tell the intelligence of an individual by the way they behave and from how successful they are at competing. "
You can't very well tell how a species behaved from a skull can you? Your (and paleontologists insistence) that brain size means anything is quite ridiculous. Science has long passed by Darwin, paleontology, and evolutionists. Tell me why an elephant is not smarter than man even though he has a much larger brain.
When you say humans are smarter than elephants you are simply saying that humans have language. And the relevant parts of the human brain are larger.
Animals with larger brains -- particularly in proportion to their overall weight -- are smarter than those with smaller brains.