Lurking, and logged in just to say this.
The bolded is not true, and very bad advise! And this is coming from a woman!
I hope no guy on this site took the bolded advise you gave. How old are you, 18?
Listen...
Women fear being overly available, and showing too much interest out of fear of being used, and the guy losing interest.

Women who are given real game by men are taught to do this to vet a mans interest in her.
Most smart women KNOW not to respond to every text. (No matter how much she likes you) smart women know not to be overly available for a man doing NOTHING to earn your time, but a "good morning beautiful" text.
So a woman not being at your whim is not a lack of interest. It's confidence. Standards, and awareness.
Besides... if a woman is THAT easy for you.

What makes you think that special?

You're not.
-A woman could be madly in love with you, and not respond to a text. Just to see how you react. Or because she doesn't want to come off thirsty on desperate.
-A woman can be madly in love with, and decline on a date or linking up, because her hair ain't done or She has nothing to wear, and wants to look her best for you. Because she likes you THAT much.
The trick is knowing women. Once you understand women, you will know things aren't as black & white with them, and judge each situation/moment individually.and don't assume Anything.