Naughty Dog has promoted Neil Druckmann to Co-President alongside Evan Wells, the developer confirmed.
Wells wrote:
Druckmann’s promotion means that both Alison Mori and Christian Gyrling will also be promoted to Co-Vice Presidents of the studio.
Over on Twitter, Druckmann said:
Naughty...
I want to say it's one to one, but in all honesty I'm a bit fuzzy there. I can recommend JoyFreak's sister site AdminIntel - Admin & Webmaster Resource where there are lots for people of varying degrees of expertise with development, you likely can get a far more precise answer there!