GREAT ARTICLE! I totally agree with it.
I think you want to show commitment, dedication, and passion about something in your essay and your application. Focusing on a specific activity or experience is a great way to do that in your essay. You don't want to look like you are trying to build a college "resume", but doing something that you really want to be doing and feel strongly about.
A few articles that I've found on this topic:
http://www.lunch-money.com/Articles/resCandidate.aspx http://www.kaptest.com/repository/te...iss_myths.html