Is there a visual indication of a wine's quality?

Is there a visual indication of a wine's quality?

You look at the end of a cork, the more it has pigmentation the better the wine. I have gone through tastings. How does one taste? Two hundred different wines, and tell which one is the best. The trick is, every expert will walk through and they will see all these wines lined up by the glass and the corks are there. Well, the corks will tell you what domain it comes from, the vintage and whatever. Look at the end of the cork. The cork that has the most pigmentation is going to be the best because it came from the ripest. These are the little tricks we do. Learn the little tricks. It makes it exciting, it makes you feel confident.