I think it cuts in all directions. I just flew with an F/O who got out of the navy a little more than a year ago . He took great pains to tell me that he just couldn't figure out why the company didn't set up a hiring booth on all aircraft carriers and hire every person leaving active duty. After all, they are simply the greatest pilots in the world. He then proceeded to pound on every landing that he made through the entire trip and miss 75% of the radio calls for one reason or another. I've come to the conclusion that some of the worse pilot that I've ever flown with are ex-military. And the rest of them are civilian pilots.
It's attitude and paying attention to the basic stuff when you first start to fly. It doesn't make a bit of difference whether you're military or civilian.