As a non-fast jet pilot, what I have seen is the following. Ex-forces chaps generally get an extra allowance for their hours as civvy hours generally start at push-back or taxy and stop when you get to the stand. They generally whizz through their training, and companies generally give credit for that. They generally interview pretty well and get the jobs they are asked to attend selection for. But quite a few are a pain to fly with until they realise that it is multi-crew, then they become (according to cabin crew), just as abnoxious as the rest of us!