As a gay man, online dating apps which I think are super GayCulture can really affect a plethora of things. It depends how the first date went. I mean, if she was super punctual and beautiful and intelligent on the first datethen I would probably wait longer on the second one but I cannot quantify the time.
Maybe 30 minutes was the longest I had to wait, in a museum restaurant. I once showed up at the right coffee shop on the wrong side of town, so it was my bad that there was a mixed connection and we fixed it quickly. If it were a second date, etc.