Unfortunately, one cannot prove anything by doing this, even after downloading a thousand samples.
The results are pretty much random. This is similar to guessing what is displayed on the screen which can display only 0.01% pixels (99.99% faulty pixels). You could probably recognize the picture of a woman on the screen. You could also guess if she is pretty, but your guess would be in fact only an illusion.
That is why in the SE Labs test all tested AVs except Webroot were awarded AAA. SE Labs knows that this particular test cannot show more than that.
The results in the tables included in OP have nothing to do with protection/detection in the wild. They can be used to show something interesting only with similar results from many other tests. The average result (calculated correctly) can sometimes show something related to the protection/detection in the wild.