In my opinion, the scores are very strange. I think that "the number of green fields" would give much better sense than "the number of completely green rows".
I suggest to read the full discussion below on wilderssecurity - it actually contains very relevant points.
Also, the test certainly doesn't include the latest build of avast! (2 more packers should be supported that are not); it may be true for the other products as well.
So, I'd say that the test is "interesting", but with very limited relevance to the real world.