If you can stand it, it's worth watching a particular excerpt from CNBC's interview with Facebook CEO Mark Zuckerberg twice. First watch the version CNBC put on the air, embedded above. In that clip, Zuckerberg answers a question sounding sure of himself, speaking in clear, declarative sentences, and smoothly using his talking points, not just rattling them off. Compare it to the clip below of Zuckerberg answering the same question in an unedited version of the interview CNBC reporter Julia Boorstin embedded on her blog. The difference shows CNBC editors' talents — and just how far Zuckerberg has to go before it's safe to put a microphone near him. It all goes downhill after Zuckerberg begins to answer a straightforward softball from Boorstin — "What is the new site design and what does it mean for the user experience?" — by saying, "So for those of you who don't know, I, we just announced, um and launched, started rolling a new site design."

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