General distrust of all predictions about the future is more or less exactly what they claimed that the experiment was measuring.

That's interesting to learn, and makes sense. The ability to delay gratification is both an input for behavior, and an output from other personality traits. Subconsciously, I think I've always had this framework that the traits that influence our behavior were somehow separable or independent, which I guess isn't necessarily true.

Personality traits I guess can be looked at as kind of an N-body problem, with every trait influencing every other. The output behavior is fed back into the system, and can then be looked at as kind of a force carrier. On the outside we think of there being N independent bodies, but as far as the real influence is concerned, they are really overlapping fields with no well-defined boundaries.