This is surprising to me. I had previously read about the European standards that included definitions for activating the brake lights based on deceleration rates, so I assumed that even with the lack of such standards in the US, they would have simply carried over the same behavior in the US cars. I had not heard about the exclusion in the European standards for regenerative braking. With that said, I have wondered how often they come on, as I do frequently see people ramming up to my @ss when I'm slowing down. Hopefully this gets sorted.