Actually, thats not true. When a crowd operates according to certain constraints (see "The Wisdom of Crowds" by James Surowiecki - http://en.wikipedia.org/wiki/The_Wisdom_of_Crowds) they don't promote status quo intelligence, but rather gather the knowledge of individuals composing the crowd.
Sure, but those constraints pretty much rule out most Web (2.0) apps, and certainly fail in the Digg case in the original post. (Cf. the "too imitative" heading in the link you provided.)
