First Stage
Yeah that is true, just because you have submitted an application doesn't mean that you will be called for an interview. Sitting by the phone and waiting doesn't work as well either as I have heard you are not contacted if your application is rejected.
Words of wisdom, go out, stay busy, try to make a couple extra bucks to take some flying lessons. If CX calls, hey great, go for it! (and it looks better in the interview if you were out working towards an aviation career while waiting). If they don't call, you already have a great start on your career and you have the opportunity to see if its really for you.
Take the expected call back times with a grain of salt, and if you bank on doing all of your stages and getting selected for training in the next 6 months, that is just setting up for disappointment.
Best of luck to everyone