“You WILL NOT know the boy/girl better if you date 12 times versus 5 times.”
I could not disagree more with that statement.
The more time you spend with someone, the more likely it is that the “best behavior” they have been on for those first few dates, will level off to a more relaxed aspect of their personality, and they will let their guard down and act more as they typically do.
That may or may NOT be a good thing, but it could certainly bring to light things that were being kept hidden more easily in the beginning. Dating should not be about a number, but rather about the quality of a developing relationship. It is not so easy to fully develop a relationship in five dates, though it is a good start.