Model S will NOT be the first because the 2012 Chevy Camaro has already aced the test:
2012 Chevrolet Camaro becomes first car to ace all NHTSA safety tests
The Chevy Camaro coupe is the first vehicle to earn a perfect score in National Highway Traffic Safety Administration's safety testing since the federal testing procedures were revised for 2011, according to Examiner.com. While other vehicles have earned an overall NHTSA 5-Star Safety Rating, the Camaro was the first to score a perfect five-star rating in all six test categories.
2012 Chevrolet Camaro becomes first car to ace all NHTSA safety tests