Ooh that's a tough one to answer. If you asked me I would have said I didn't have any pre-labour either time. But with number 2 I had a S&S at my last appointment and my ob said she could feel me contracting while she was doing it and I had no idea so I guess I did have some pre-labour (this was 4 days before DD2 was born).
So I guess my point is there would be a difference between pre-labour you are aware of and pre-labour you are not aware of so it is hard to judge just how much pre-labour occured.
BTW DD2 was born in 4.5 hours, not sure if that means extended pre-labour (at least 4 days) and quick labour?? Maybe? Maybe not?