I've read somewhere, that he said, that some bands had nice amps with them, but he sucked at mic'ing them up, so he sticked to POD Farm, because he was getting a lot better results. I don't know if it's true, though.
I wouldn't say he sucked at micing real amps. 'Before Their Eyes' album from 2008 was pretty good and I think that was a combo of real amps and something else. Pod Farm has a nice sound if work with it a bit eliminate the honking/hiss that comes with it.