I'm sorry if I missed it, but was there an actual quote by Orci, Abrams, et al. or a confirmation that Kirk is actually a cadet when he is supposedly taking the command of the ship in lieu of Spock?
All I know is that Kurtzman once said about the black shirt:
"It is not a random thing. There is a reason his shirt is the color that it is."
and Entertainment Weekly Magazine wrote:
"Black is apparently the color of space cadets in Abrams' universe"
Besides Kurtzman's enigmatic and non-specific statement, plus the attempt at clever writing by the less-than-authoratative EW magazine, was there any other official indication that Kirk is wearing black because he is an underclassman cadet AND it was that underclassman cadet that (temporarily?) becomes the commanding officer of the Enterprise?
I think it is possible that Kirk is at Academy Command School, or he is possibly an Academy instructor when he "needs" to assume command over Spock.