First off, I wish I had a forum-batlight of sorts to flare. MODOK needs to come in this thread and drop some knowledge on all of us.
I would make two points to eightohfive about Berardi and Berkhan: firstly, Berardi didn't put on lean mass with it--he got close to maintaining while losing a lot of body fat. Second, he said that he had clients put on lean mass, but we don't really know how experienced these clients were. if they were totally new to resistance training, then they could probably do just about anything and put on lean mass.
I mean, I'm sure that there are people on this forum who have had serious success with IFing for putting on mass or whatever. But when I think of the guys on here who have gotten to points that are truly impressive--MODOK, Waylander, Prof X, KingOfBeef, etc--I don't think any of them got big by spending a large portion of their days fasting and then pounding a ton of food at one time. I just feel like IFing is the exception, not the rule. Then there's the strain on the system that long-term IFing can have (MODOK has written about this).
I'm sorry if this post was too IF-centric, as I get that Ryan's OP wasn't necessarily about IFing.