In my opinion, the mounting type isn't really a leaf-spring, but more of sandwich mount with flex cuts. A leaf-spring mount will have actual "leaves" or extensions on the plate that can bend. Here in your design, the exterior parts of the plate will have some flex, but since it's all connected then it's much less bounce then actually having leaves. This isn't to say that the mounting is bad, but it isn't a leaf-spring (to me, in my understanding) and so will feel/behave more differently than what you expect.