This sentence from the blog is key, "Caveat: Pair programming is a learned skill. It takes time and work to do it well." Pair programming sounds great and all

This sentence from the blog is key, "Caveat: Pair programming is a learned skill. It takes time and work to do it well." Pair programming sounds great and all but if even one person from the "pair" is not good at it, everything falls apart. Also, the pair's chemistry has to be on point like Jeff Dean and Sanjay from Google :p