Uncanny

I put my blog URL into this site and from analysing my writing (or lack thereof!) it worked out I was an ISTJ on the Myers-Briggs scale. It just so happens that my Myers-Briggs results consistently place me as an ISTJ. This has got me thinking: I wonder what it would think if I fed it something other than a blog -- such as a work of fiction I had written or my D.Phil thesis?