Old wives tale that labor is half as long after your first. Any truth to this? How long was your first compared to second/third/etc.?

My insurance company has been calling to check in. I finally answered yesterday and, among other things, she said to go to the hospital at 5-1-1. I thought it was 3-1-1 and she also said second (or more) babies tend to come quicker. I want to labor at home as long as possible. But obviously within reason!