Tesla claims its Tesla Model S is the industrys safest car by virtue of Teslas deconstruction of government crash results that give Tesla a 5.4 rating on a scale of 1 to 5. Is Tesla blowing its own horn loudly in a public place or is the electric vehicle pioneer suggesting we need better crash tests? Perhaps both. Three years ago, the government revamped test procedures because the results looked like report cards at Harvard where mostly everyone got an A. It may be time for another rework.