I want to know the answer to the following question:
What was the ultimate view of Content ID's performance after a 2009 test?
All the background I'm provided with is that "An independent test in 2009 uploaded multiple versions of the same song to YouTube, and concluded that while the system was "surprisingly resilient" in finding copyright violations in the audio tracks of videos, it was not infallible.". Is that enough to answer the question?
Answer: yes