It's a pretty meaningless semantic discussion. Autosteer and TACC was engaged at the time of the near miss. It doesn't make any sense to me to think of "Autopilot" as "just auto steering" or "just blind spot monitoring" or "just emergency braking". It's an aggregate of all the technologies working together inside of one vehicle to make driving more safe.
The point is, the car prevented an accident, and that's awesome. I disagree with CR implying that it is equivalent to any other cars AEB. If we are getting nit picky, the Model S brakes faster, and is safer in an accident. Brembo could argue that it wasn't the AEB system that saved the day, but their high quality brake components. Those few feet make a difference after all.
Had the car barreled into the oncoming car, and I posted a video saying "First accident using Autopilot" I am skeptical that CR would have come to Tesla's defense saying "Actually, the autopilot worked fine, it was just the AEB that failed". Sounds ridiculous in the reverse.
As a side note, I would rather have to take a car in more often than die or kill someone. I guess Consumer reports disagrees, but that's okay
Update:
I guess Tesla's own website makes the point better than me
Autopilot allows Model S to steer within a lane, change lanes with the simple tap of a turn signal, and manage speed by using active, traffic-aware cruise control. Digital control of motors, brakes, and steering helps avoid collisions from the front and sides, as well as preventing the car from wandering off the road. Model S can also scan for a parking space, alert you when one is available, and parallel park on command.