We are all different; all I can say, from my experience, is that if a regime is right for you, the effects are noticeable, within a very short time span.
What is crucial, is not too expect too much too soon. A little feeling of fattiness, is enough to show you are on your way. Once you see changes to your nipples, it is really happening, etc. If you really let your body talk to you, so you are really aware of every little change, or whether things are stalled, then you are in a position to decide on the best regime. If you get it right, things can happen, in a quite dramatic way, as long as you realise that ,drama, is, mainly, of the watching paint dry school, of action. Yet. at other times, about a qurterof a cup size, can be put on in a few days.
If your body tells you a regime is not working, after careful thought, and letting your body talk to you, then time to try another.
If you are really in tune with your body, you wiil be aware of things slowing and, more often than not a little massage will get you back on track