They were trying to figure out Grape type and origin country not "quality". And even then was less than 50% accurate.

That's the best definition of better in this case. I have a friend who is a wine maker(enologist) and he always says the same, the best wine is the one you enjoy not the one some magazine/person/web says. You can but the most expensive wine in the world and do not like it then it doesn't matter if it's good or not.