Never head Cahill unfortunately. I doubt he's better than Courier though.
JC is much better as a commie than an on-court interviewer, and has clearly earned his stripes. No doubt about that.
DC is very rarely wrong. You and I both know he knows Andy very, very well. That makes me very interested in his insights.
When he and JMac get together, I feel like I'm eavesdropping on a conversation between two guys sitting by the fire with a scotch in their hand who really know their stuff.