People who want until marriage to have sex have a much lower divorce rate than those who engage in premarital sex.
The second link is about young teens having sex, particularly when it is unwanted, not about pre-marital sex in particular.
The third link is about a variety of factors such as how many partners, whether or not someone was into hooking up, whether or not they were faithful, to determine the quality of a marriage partner, not about pre-marital sex is particular.
Seriously, do people think no one will read their links and notice the claims don't match reality?