Quite a few years ago, my partner's friend and her husband came to visit, and brought over a bottle of home-brew wine (some red). I told the fiend's husband about the Vinum glasses and he wasn't convinced. Serving the wine in 2 different shapes, both of them admitted the wine did taste different out of both glasses (not that you can make proverbial silk purses....)

There's an interesting Austrian connection as both my partner and her friend are ethnic Austrians though only the hand-blown glasses are made in Austria these days.