I'm not sure about the 5%. But I do agree dating has always been a game and only those who perseve wins.

Back in the 20s men would flatter women with words and flowers, and the women picks her choice from the lots.

The difference is that now it has become a chess game. The one who manipulates the other more wins. And since casual relationships is now a trend, people aren't putting in the effort to create a sustainable partnership for long term.