The last category of instant attraction is -
Category 3 - Not Sure Yet
Fall into this category and it is a double edged sword. You have not worked on your body language, grooming or physical fitness to create an instant attraction. But she has not rejected you outright yet either.
As you develop your approaches (and your confidence), this is where you are going to fit with most single women that you meet in real life. Unless she completely shuts your advances down, then you are in with a good chance. Just don't act like most men and take the first short answer as a sign of rejection and make a quck exit. There is nothing worse then a premature withdrawal.