I'm in week two and, so far, I have gotten through each workout in under an hour. I don't superset until I get to the optional stuff (the things other than the first three exercises each day) and I try to stick to 90 second rest periods (Jim mentioned it somewhere in relation to another template, so I tried it here and it felt good).
I did place the squats on Friday at the end of the workout, which was good advice from Jim, as it turned out.
I have use of an athlete's weight room where I teach, and it's empty when I use it, so I guess your results will vary as far as time commitment goes. My workout basically looks like this:
Deadlift 5 sets ~12 minutes (sometimes takes 2 minutes between sets because I have to load/unload weight by myself and I want to make sure I have my focus right before I pull)
Bench Press 7 sets ~17 minutes
DB Row 1-arm 5 sets ~10 minutes
Inclined DB Bench Press / Chest-supported Row 3 sets ~ 10 minutes
Barbell Curl / Close-grip Bench press 3 sets ~ 10 minutes
It keeps me moving consistently, but Deadlift is the only exercise where fatigue is a concern. The two supersets don't feel like overkill and I haven't had any joint problems using them with other templates. So, the workout takes 60 - 70 minutes, not including warm-up and post-stretching.