I'm behind in my podcasts but while at the gym today, I listened to most of one that I found pretty interesting regarding the subject of the differences between Mash Hopping, FWH and the standard 60 minute hop addition.
Visit Basic Brewing and click the Podcast link and scroll down to the May 8, 2014 show. You can either use itunes or just listen via streaming.
http://www.basicbrewing.com/index.php?page=radio
First Wort, Mash and Bittering addition podcast
Moderators: BlackDuck, Beer-lord, LouieMacGoo, philm00x, gwcr
First Wort, Mash and Bittering addition podcast
PABs Brewing