I agree with most of the principles of The System but I’m a busy man and I don’t waste my time with flakes. When the company is good, my first/ second dates easily exceed 3 hours and I never have any problems. And when it comes to phone calls, I call whenever the hell I feel like it, as opposed to waiting a preconceived amount of time (although I do typically keep the calls short). If you establish that you are fun and have an interesting life EARLY on, then you don’t need to play these games.
I agree that this girl is emotionally unfit for a relationship at this time. Better that you found this out after a couple of days as opposed to dragging it out over weeks/ months!! Treat her like any another person, and when she asks you out again, tell her that she blew her chance.