Not sure this is news, the Model S and X are also five-star. We don't report when the new model of the Chevrolet Bolt gets 5 stars. I think we can probably calm down a little about the Tesla news.
That's because the Chevy Bolt is lame and is also not constantly barraged with negative news. Positive news is thus equally over covered.
I thunk its because many people are expecting the car to be garbage when it comes to maintenance and there were talks about quality issues, although this is probably not an issue with test cats
The news is because is five-star in every category. Not the same thing with let's say: BMW 3 Series.