I just played the Torpedo the Dreadnought mission.
I got 14 torpedo hits on the Dreadnought with 18" fast torpedoes, with the optimized torpedo propulsion tech, from a total of 24 launched. 3 destroyers with 4 tubes each.
The Dreadnought never dropped below 61% flooding and 65% structure..
This.. huh. How good are the torpedoes in this game again?