There's a story on a blog shared on FB of a woman whose first labour was 40 mins and second was 22 mins. For the third her DH wisely read up on what to do and the baby was born after 10 mins in their bath at home. Babies all perfect.

Now THAT is the Mercedes Benz of birthing bodies!

FWIW I recently read that quick labours are generally the most uncomplicated and the least likely to have any issues.