As to not start an argument, I'm just going to add that I think "quitting" is subjective to everyone. Your definition may be stopping forever, someone elses may be stopping for a period of time.
Kind of like, for me, I quit playing badminton and volleyball once I got out of highschool, but I'll still play a game or match with my friends if there's an opportunity. I don't know if that really applies to smoking... but just "quitting" in generalfor me, at least!