It does look good. That's down to a good shooter as well. One thing to note though, is that there was a lot of tripod shots. Stability goes a long way to making something look good.
Exactly, I think it was many things.
First and foremost
-Great Shooting
-Amazing Location
-Nice Edit
I think this piece could have been done on almost any camera and on those extreme wides you do see some lack of detail in objects. Overall though low light looked nice and I didn't see any noise, plus skin tones looked very natural. Looks like Canon may finally be getting their act together..