My AW made the transition a few years ago. I'm convinced that she was already alcoholic before she switched, though. She would down a case of beer on the weekends, popping one right after another. If we were on a long drive, and stopped at a convenience store for snacks, she'd buy a quart of beer to drink.
I'm not sure why she switched... maybe she was worried about the calories from drinking 12 cans of beer in an afternoon. In any case, I almost wish she'd go back to beer, because the Vodka turns her into a drooling zombie, and the beer never had that effect.