WSJ.com - Tastings: "A couple things became obvious. The panelists couldn't easily distinguish the imported lagers from the craft-brewed American lagers. But almost everyone was able to spot the national-brand lagers when they tasted them -- noting a smooth sweetness and a clear lack of the hoppy aroma or bitterness that distinguished many of the others. Often, they didn't care much for what they tasted, with beers from the big U.S. brewers grouped among the lowest scorers."
I probably can't distinguish the American craft lagers and import lagers either. I always go for the local brew to encourage diversity and variety.