Are there exceptions to "he's just not that into you"?

One of the signs that “he’s just not that into you” is that he doesn’t try to contact you because if he wants to find you, he will. And don’t get tricked into asking him out. If he likes you, he’ll do the asking. (According to Greg whatshisname that wrote the book.)

BUT I’ve heard guys say (esp here on Fluther), “Ladies please don’t be afraid to make the first move/ask a guy out. In fact, it’s much appreciated because there’s some much pressure on us to initiate.”

So which is it? I am so confused.