Psychological Neoteny

A few months ago I posted an excerpt from Michael Crichton's book Next. I'd forgotten about it until an anonymous commenter dropped me a link to point out that Crichton didn't create the story about psychological neoteny, a theory positing that "...many older people simply never achieve mental adulthood". In fact, Bruce Charlton is a real person and really has created the theory Crichton borrowed for Next. The Discovery Channel article is much more detailed than the portion quoted in Crichton's novel, and is quite interesting. Do you seem to exhibit some of these characteristics? Do you feel as if you're immature? Hmmm...