They give them an exercise typical of the kinds of work done at Menlo. While the pair work together, a staff member observes their interactions. At the end of 20 minutes, everyone will get new exercises, new partners, and new observers. Twenty minutes later, they will switch for a third time."
Talk about extreme - excuse the pun - commoditisation of programming. Your experiences no longer matter. Just walk in, do your audition, and hope you can shine against the herd. This is frankly ridiculous and I cannot think of a single benefit this would yield.