Personally, I've never been in this situation, but I know my parents didn't have sex on their first date and they've been together 23 years (I believe they waited till the 3rd date). From what they've told me, my mom was the forward one--my dad, being a gentleman, didn't make a move to kiss her on the first date. But when she got out of his car to go to hers, he had rolled his window to say goodbye one last time, and she stuck her head in and slipped him some tongue.
Of course, my parents moved fast in other ways: they got married about six months after meeting and had me six months later
