Man. You guy's sound like you had it easy every time.

DD1 my waters broke & 18 1/2 hours later she was born. Contractions started an hour after waters broke.

DD2 30 hours from my first contraction. They had to break my waters at the end.

DS 5 hours. Full on.

The only thing I can say about my 1st & 2nd labours is that they were very different. I don't think it was any easier or less painful, just happened different. With DD2 I knew I had to relax & let it happen, so that helped. With DD1 I spent 10 hours fighting the contractions. I made it hard for myself.
With DS it was definetly easier. Still just as painful, but quicker & easier.