All of the episodes are around 2 minutes longer than the U.S. DVD's. From what I hear the U.K. sets for Series 1-4 are the same, but 5-7 are not as they just used existing stock for those seasons. That said I would never have noticed just by watching the episodes if I had not compared the timings. I do not see or hear anything that would lead me to believe that these are slowed down (even though they are).
11/13/13 at 4:18pm