There's an interview somewhere with Orci and Kurtzman in which one of them claims that the Reeves-Stevens novel Prime Directive was a source for some of the characters. I just reread the novel, and it does give some insight into the movie. It explicitly states Vulcans have emotions, and it highlights Kirk's adaptability and skill - as well as the skill of the other crew members. The plot, involving disparate crew members coming together to regain their posts, has very slight echoes of the movie's. I do think the first chapter of the novel is well-worth reading for its insight into Kirk, in particular.