Wasn't suggesting stalling a DA40 into the ground was good idea; it was just that this was an interesting statement from the article. As you say, clearly the BRS has advantages, for example when you don't have control / pilot incapacitation.
The DA40 does actually have deformable elements under the seats. (Presumably all aircraft that now meet the 26G crash cell requirement must have energy appropriate absorption mechanisms, different by aircraft type.)