While several people have pointed out that a large ship turning to present its wedge can actually lower the number of missles it can take out, a lighter unit with fewer CM and PD will greatly increase its protection by presenting its wedge.

Also, if you are in the wall of battle (we had 3 SD and a DN) and one of our SD got pretty well hammered. That one rolled, to present its other broadside. With its consorts still able to lend their CM and PD, the wedge provided immunity for that ship while it rolled to bring its intact side to bear.

You sir are a 100% correct.