I was at a dinner Saturday where the hostess whipped out this gadget. Google Vinturi for a description. We were drinking a high alcohol rhone ranger. Immediate effect was the alcohol was cranked up and masked every flavor, but after a few minutes of sitting, the wine was much more balanced. It was much softer and all around more flavorful than the wine poured directly into the glass that sat for the same time. Maybe a bit of the "mollydooker shake" affect at work. It would be interesting to try this on a bordeaux or any lower alcohol wine for that matter and see how much it improved the taste.
FWIW, The sound it makes when pouring is similar to the mouth vacuum at the dentist office...delightful ; )