I'm an Air Force guy transitioning to a civilian job. From what I'm learning, as I apply to the airlines, PIC time is the all important time, especially PIC Turbine. Alot of airlines have a conversion factor for military pilots, you have to look at their website to get exact numbers.
Your primary and secondary time will only count as PIC after you have upgraded to Aircraft commander. All your time as copilot only go to total time. All the airlines specifically state the time at the controls is not PIC time, it's the time you sign for the aircraft as the captain/aircraft commander.
Southwest is a little different. All the other airlines also count other time after AC upgrade, since like they said, it is the time you've signed for the aircraft, however, SW makes you subtract other time. So while I have 1600 PIC time with most airlines, I only have 1300 with SW.