I have done multiple searches, and each thread seems to give conflicting information. I was called on (on short notice, nonetheless) to shoot a debate on my college campus. I was thinking of shooting Portra 400 at 1600, but therein lies the rub. Most people agree that it shoots well enough at 1600, but there's disagreement as to whether or not to push the film in development. I've heard no, +1, and +2. I've also heard to shoot at 1250 instead, to preserve shadow detail.
Anyway, consider this a poll: When shooting Portra 400 at 1600, how should I develop it?