From the article:
Our bodies anticipate the effects of alcohol by a conditioned response, like Pavlov's dogs. Our brains start to release euphoric signals in response to the taste of beer, even before alcohol even gets into our blood, because we seem to know what's coming.
What do you think? Have we conditioned ourselves to anticipate the feeling of serenity (or in some cases revitalization) of tea at the first sip? It definitely seems likely.