A great and inspiring talk. I think part of their success was also the fact that after saying "deliver something every 90 days", they had a really good support crew for the projects to turn to. This support crew would move between projects offering their advice, coaching, holding talks or workshops on how to overcome some of the problems that naturally arises when an organisation suddenly must adapt to shorter delivery cycles.
The projects first experienced the problems, then found solutions on their own or through the support team. They focused on the goal which is rapid delivery and shorter feedback cycles, instead of telling everyone how to do it. This gives commitment and motivation to the team members instead of having someone just force agile on them.
