Has Quora reached a tipping point and became just another site for teen-advice on the internets (I'm looking at you, Yahoo Answers!) ? Is this a natural progre

Has Quora reached a tipping point and became just another site for teen-advice on the internets (I'm looking at you, Yahoo Answers!) ? Is this a natural progression for any site with a user-generated content? And how to keep things relevant? I wonder what you think :)