well.......for me it was.
first baby was 7hr 'estalished' labour but they conveniently ignored me telling them about the 14hrs of contractions befoer then as I wasn;t 3cms dilated for that......and that includes the 1hr of pushing (eek at the remembered pain for that).
DD2 was 4hrs established labour, only 2hrs of contractions before that, and the pushing was 5mins!!!!
DD3 was longer (12hrs), but then I had SPD and couldn;t walk, so then couldn't get things going the same. Again tho, 5mins pushing.
DS1 was 7hrs again, and again 5mins pushing, and then DS2 was 4hrs with once again the 5mins pushing.
and also, from DD2 onwards, I got to 5cms dilated with each of them, and then babies were born literally 5mins from that internal. Seems to me that I get to 5cms, stay there until I have an internal, that then triggers something and I have the babies 5mins later......
only things I will warn........after pains are worse per baby, which I was never told about so were something of a shock!