I never considered pair programming as a tool simply to increase raw velocity. For me, it's almost always been a pedagogical tool - it's an effective way to up

I never considered pair programming as a tool simply to increase raw velocity. For me, it's almost always been a pedagogical tool - it's an effective way to up-skill a developer who's learning (both young developers and experienced developers learning a new skillset). I would never force it on my team. But, given the task "teach Bob X", they often come to some form of pair-programming on their own. I usually only suggest it when learning becomes a roadblock.