Hi there.
I was induced with my first baby, due to being "post dates". From the time i was in established labour (about 10 hours after the gels were applied) it was about 6.5 hours all up, and 2 of those were pushing.
WIth my second baby I went in to labour spontaneously. The contractions didnt seem so intense either. It was about 3.5 hours in total, and didnt get too painful til the last hour and a half.