We've been having a similar discussion at JBU in which we've debated whether major change can occur from bottom-up brainstorming or whether it needs to occur from top-down strategic thinking. This Gladwell argument would say that bottom-up social networking is good for efficiency and adaptability, but "big change" requires more top-down heirarchies.
http://www.newyorker.com/reporting/2010/10/04/101004fa_fact_gladwell?currentPage=all