My dd was just about to pop, and my waters still had not broken. The MW took care of this, and DD was born about 5 minutes later.

15 hour labour.

I have no idea if it would have sped anythign up, but i do know that having it ruptered just before she said hello to the world made the process very wet and slimy - there was absolutely no pain when she came out, just felt like a big blob of jelly!