What is Dean's text to Jeff referencing? It sounds like he felt Jeff underperformed at some early gig, but everything I've seen from Jeff, he has killed it! I don't see how Dean couldn't be anything but thrilled at what Jeff has given them so far. He kills it on the record and kills it again on stage!
As far as the stuff about Robert, I'm sure there is some truth in there. I tend to believe these kinds of reports are partially true. I remember the stories of Robert banging on Scott's tour bus door, shouting, "Come on, Axl!" Maybe Robert does have a temper, but at the same time, maybe Dean was exaggerating a bit in this. Plus, I'm sure Dean has some of that rage himself too, as evidenced by Jenn's stuff. There again, I'm sure Jenn's reports and Dean's denials are both partially true but a bit exaggerated. Whenever there are two sides presenting conflicting information like this, the truth is usually somewhere in between.