[sanderjd]

No way! It's a fantastic thing! There is no one best way to teach any subject, and even if there were, who is to say that Coursera is well-positioned to decide what that best way is? Diversity in courses covering the same material in conjunction with good tools to aid in the decision-making process for the student will lead to the best outcomes. It's same reason we have so many different universities - it isn't just because of meatspace scaling limitations.