I did a couple consulting stints at Pivotal, working on the CF team. They have a very particular methodology that evolved from the earliest days of agile (Rob Mee was a friend of Kent Beck back when XP was being worked out). I walked in there as a very experienced engineer and a healthy amount of skepticism... and it turned out to be a fantastic learning experience. I've since taken the Pivotal process (yeah, even the weird stuff like pair programming) and used it effectively to manage subsequent companies.
I don't love everything about Pivotal (neither Ruby nor Go make my favorite-languages list) but then, not everyone at Pivotal does either. But overall they do agile right, and they have a lot to show for it. You can mock 9:06 but also note that people go home at 6pm and have lives. The schedule has its upsides.