I gave you this link up above.....it's a bit long....but the Chair of the new DSM V & he was also the chair for DSM IV talks about overdiagnosing...

Might be very interesting for you to listen to:
http://forums.psychcentral.com/showthread.php?t=230415

This link takes you to the actual youtube link I placed in the video forum......so you can click on the actual youtube link in the post this link takes you to.

Think this will be very interesting because it's on the topic of diagnosing especially since it's coming from the chair of the creating group of the DSM's where all the Dx's come from