yeah, but you dont know what time they started it, the book time is 5 hours, but that is a target time, not an average or guaranteed time. I would rather it took a bit longer and they made sure the timing was 100% correct!
I did my first one a couple weeks ago, I took my time and in total (including tea breaks and lunch and dinner etc) it took me about 11 hours, but that was start to finish and I really took my time to avoid making any mistakes.