Originally Posted by
Doug_1970
However, I still don't see the point in the waiter pouring just a little bit into the glass first. They may as well fill the glass up and if it's ok (which it usually is) then fine, if there's something wrong with it then pour it down the sink. The only difference is whether they need to pour a full glass or a little bit away.
Well some people swirl the glass of small pour before tasting. A bit difficult to do this with a full glass.
I can't remember precisely what this allows the wine to do - perhaps introduce oxygen? Of course, this doesn't stop anyone from quaffing right from the get-go...