From what I've seen so far (10-15 examples), mobbing is superior to pair programming. Pair programming has a lot of social pressure (I don't like working with X!) that just isn't there with mob programming.

There's gotta be some inflection points, though. This is an extremely interesting area to watch. If it holds up in general, it's really completely re-structuring what we think about when we think about a tech team delivering value.

ADD: The thing to keep in mind here is that we're still very early in the hype cycle. Lots of smoke, and people who make money waving their arms around. Having said that, there is real value here. So it's interesting.