Are there any standards when it comes to rating a whisky's finish? Is there any real way to differentiate between "medium-long" and "long"? I mean, how can one say what is "short" and what is "long" if there is no point of reference, other than other whiskies? Sometimes when reading reviews by professional whisky writers, one will call a finish "rather short", while the next guy says "nice and long". Is it all strictly a matter of opinion?