I thought they counted labour from when your contractions become regular as in 3 good contractions over a 20 min period or some thing like that.

My first labour was 10 hours (7 hours first stage, 30mins transition and 1.5 hours second stage pushing). Second labour was 3 hours (2.5 hours regular contractions and 15 mins of sheer pain (2 pushs and she flew out)).

Not all labours are the same just like no two babies are the same. BTW a quick labour doesn't mean less painful either. I much prefered my first labour.

All the best and wishing you a wonderful birthing experience