That's not literally true. I'm going to squeeze it a bit, I'm going to curve it a bit, so actually slightly fewer than a sixth will get straight A's, and fewer than a sixth will get C's and below.
Heightened scrutiny by the FAA may not do much for their business for the time being, but in the long run, some analysts say, it's better for the FAA to get its policy straight on small, start-up airlines.