just so we're clear, the pot being black doesn't make the kettle any less black, does it?
Nope, it's wrong when Fox does it and it's wrong when NBC does it.
I just watched the video and this wasn't just "editing for time", the edit completely changed the meaning of the story.
The actual story was that Romney made a contrast between government red tape and buying a sandwich. The story as presented by NBC (including the anchors' reactions) was that Romney was amazed at buying a sandwich, a completely different story.
Not as bad as Fox often changing "R"s to "D"s when governors or congresscritters get in trouble, or arguing in court for the right to lie to viewers, but bad enough.