According to the renowned "Highway loss data institute" (who hasn't heard of them!)
ARLINGTON, VA — Hybrids have a safety edge over their conventional twins when it comes to shielding their occupants from injuries in crashes, new research by the Highway Loss Data Institute (HLDI), an affiliate of the Insurance Institute for Highway Safety, shows. On average, the odds of being injured in a crash are 25 percent lower for people in hybrids than people traveling in nonhybrid models.
“Weight is a big factor,” [...]
If hybrid's puny batteries increase the odds by 25% then not having an ICE in your front crumple zone and carrying around a much bigger battery would make the Model-S really safe (except for other motorists and pedestrians, that is).