Is it true Wine tasting is a delicate art?
You could say so, however, results have surfaced that definitely tend to contradict the reliability of wine tasting.  Blind testing has identified many inconsistencies.
What do you mean by reliability?
Well there used to be a recognized system that people thought was concrete surrounding wine testing.  But recently scientists have been exploring the objective parameters of the human olfactory system.
How exactly is wine tasting done?
Typically the wine tasters will all sip the wine, then use an ever evolving system of terminology to describe the aromas, flavors, and characteristics of the wine.