Pouring champagne into a glass is far from being consequenceless with regard to its dissolved CO2 concentration.
On the Losses of Dissolved CO2 during Champagne Serving
Apparently sparkling wine is best poured into a tilted flute, although I'm inclined to agree with the comment at Neatorama, that champagne
... is best poured into a slipper, while atop a round fur rug, in front of a fire, while listening to Al Green...
