Milk changes at 6 months?

I read somewhere that your milk production changes at 6 months...it goes from depending on hormones for production the first 6 months than it becomes supply and demand where you produce as needed and you don't need to "worry" as much about your supply, and you won't be as engorged and leaky as you are early on. For my seasoned breastfeeders is there any truth to this?