[lrajlich]

Yes, big 5 is a good model for disposition.

However, to be precise, conscientiousness isn't the same thing as grit. To illustrate the distinction, look at John McCain - he embodies a sort of tenacity and resilience I would call "grit" (thumbs down at 2am), but isn't the most conscientious (didn't vet Sarah Palin).

I'm sure there's studies to say charisma and social intelligence correlate with intelligence, or some academic would argue those are a form of intelligence, etc. The article specifically calls out IQ / test taking intelligence as being overvalued by society in general, which is what I mean in my comment as well. Eg, The SAT doesn't test you for these traits and these traits will not make much of a difference in an academic setting.