Thanks for your reply. I have since done a little more internet searching and found others saying the actual time of the procedure was as short as around 8 minutes. Good to know that there are others out there that were quick.
I guess when I read that 20-30 minutes was the average, I assumed that was the time of the actual procedure and work they were doing and not the start to walk into the room to getting dressed and leaving time.
I talked to one of my friends and she said hers lasted about an hour...so maybe it does just vary from person to person..........
Thanks again!