I think the P vs J stereotypes are most difficult to deal with, here.
I personally believe it takes a while for the "J" part of anyone to appear in a discernible way. Children do not start out disciplined and organized. As one gains responsibility, it takes a while to understand how to manage it. While a J is learning to manage responsibilities, the J will still appear to be mostly P. Even after that, a J will "feel disorganized," even when they aren't in comparison to most others.
Part of it is that it isn't about how organized one is, or how much one procrastinates, but rather how one sets priorities. No matter how much a J procrastinates, the J will usually finish the task on time. The J feels a responsibility to be done on time. It is possible that one could say that someone who never procrastinates is "very J," but that doesn't mean much in MBTI terms; it just makes one's type in that regard more definite.
That said, I've been meaning to start a procrastination club, but I never quite seem to get around to it.