What is the significance of Koizumi noticing Kyon's mole?


What is the significance of Koizumi noticing Kyon's mole at the end of Lone
Island Syndrome?

I don't think there was this ever an explanation made in the anime... was
there any context given in the light novel?

<http://www.youtube.com/watch?v=gYHm7N3EtmQ#t=44s>




I don't have any hard evidence to back it up, but I always assumed that it was
at that point that Koizumi actually started taking Kyon seriously. Instead of
just looking at what he seems to be at first glance, he started peering into
him at greater depth. And, since it's mostly a comedy series, that greater
depth involves a mole.

