the Zero stretch in braid will cost you fish if used without a shock leader. uni to uni a piece of 40-50 lb test mono onto the braid for best results
I am not sure I completely agree with this statement. I think one of the points people are missing is the action of the rod. A heavy meat stick will not have enough action and can put too much of a strike on the fish. So with this in mind I agree with everyone. A moderate or fast action rod will have more bend and give you less of a direct strike. The bend of the rod will give you enough of a shock absorber so that you don't pull the hook. Also the depth and the drift speed is also important. If the current is moving the lines away form the boat a lot, there is enough line to take the shock of the hit.
If you don't use a mono leader you have to tone down your strike a bit. If you use mono then wail away.
I have had plenty of passengers on board with and with out mono leader, and I didn't see a big difference. One thing I can say that I did see is a fast action rod with mono leader couldn't put enough of a strike on the fish in deep water over 200' or over tended to miss the fish more.
Cod can take a strong hit. There mouth are tough when related to haddock which can't take a strong hit because they have softer mouths.
I do like having mono leader on the braid to ease the tangles. I hate down time.