My mom was induced early with me because she was afraid she would give birth at home if allowed to go into labor naturally (first labor was a total of two hours from first contraction to delivery).
She said that she was set up with the drip and felt nothing... she watched a movie on TV and kept waiting for contractions (probably at least two or three hours). The nurse came in and broke her bag of waters as she was very dilated, she had one really huge contraction, was fully dilated, and I was born about ten minutes later.