The interviewer asked what advice and recommendations Rachel would give teams that are looking to change their processes. In response, Rachel said that they should read around many different flavors and not to get too hung up following practices exactly. While I agree that reading around various flavors is a good thing, I can't help but think that during early adoption it would be better to call in a coach who has worked successfully with lightweight processes to help the seed to grow. If a team experiments with different pieces of various processes without first having a working knowledge of them, it might risk pulling apart harmonious practices that are not so effective individually.
In my judgement I am possibly over harsh on the ability of others to pick up on this - but I doubt I would have so easily grasped it myself had I not been fortunate enough to work with a great coach.