Tim Brown has always had a big mouth for some reason. It's like he feels jaded because he played on lousy teams almost his entire career.
As for Callahan I've never heard anything but great things about him as a Oline coach. He is a technical junkie. These young guys can learn a lot from him. Also as the HC of Nebraska, following a legend, and then switching from the triple option, to the WC offense was like trying to stick a square peg into a round whole. That would take years to accomplish with recruiting, etc.
I love the hire, and could care less about Timmy Brown. He still jaded because Aikman didn't want him when Jerry asked if wanted to go get him!