36 hours of labor
including 4+ hours of pushing
lots of braxton-hicks throughout my pregnancy from about 21 weeks on, but no prodromal or practice labor in the late weeks until i started feeling crampy, having loose stools and losing my mucous plug the afternoon before my labor began.
now i suspect that he was positioned slightly off, but there were no physical indications of malpositioning immediately after birth and there was no moment of "shifting" that i've heard some women experience with malpositioned babies.
so it doesn't fit your theory, but as someone else mentioned, just because some experiences don't fit your theory doesn't disprove the theory.
someday when i'm rich beyond my wildest dreams, my research foundation that i want to create will do just this kind of research...