''The He-111, Bf-110, and B-25 don't have automatic slats. These greatly enhance lift at low speeds or high angles of attack''
Yes but those dont prevent stalls, or provides more enginepower.
Turning sharply (minimum radius turn) in the SM79 while carrying a max bomb load and fuel, feels like its on rails. No shaking, or other warnings that you are near the aircrafts limit.
And it will keep up its speed the whole time.
Even when flying a bf109, if your turning sharply, your speed reduces, and you will end up with a nose down attitude.