Yeah, it's cool though. I think the encouraging part is the story how he made it to success. Neither album was obviously done by his brother, but I believe the second one was recorded in Hawaii at a studio in Jacks back yard (converted garage) that was mostly built by his brother.
However, if you've ever heard any of his little 4 track recordings, they were all done with a Shure Beta 58 (as far as I understand) just placed so it picked up both guitar and vocals. One thing I like about his music is, it's written first to be played live...not all over produced, then he just goes in the studio and records it. Little to no studio magic. What you see is what you get...few overdubs.