Every applicant at one point or another has analyzed too much into what a recruiter says or how he acts. However, there are definitely some clear signs out there. For example, if someone says "good luck in your future endeavors", you probably didn't get it. Similarly with a plain "good luck" or not bothering to hand out business cards.
A good sign might be if they go into "sell mode" and are trying to convince you that you should work there. If they start asking you about random things like sports or your hobbies then that is usually a good sign as well.