Don't Jump to Conclusions...
As others have rightly pointed out at length, there is far too little to go on here. Further, many intelligent people exhibit some of the supposed signs and symptoms of being a psychopath. Most people exhibit at least a couple. On a side note, I would like to point out that a person saying "um", "uh", "er" more than others may be an indication that they are looking for the right words or phrasing, not just to curry favor, but because they wish to maintain a certain standard of articulation. Often, people of a lesser general intelligence or vocabulary will not exhibit the aforementioned tendency because they fail to bother regulating what comes out of their mouth.
