There is a vocal group of Napa aficionados who seem to be hooked on a couple dozen larger wineries in Napa Valley. I don't know how widespread this is, so I may be here with some earthshaking news.
Napa has nearly 500 wineries producing 1,700 wine brands. Yes, I said one thousand seven hundred different labels. Holy crap! There are 400 wineries with tasting rooms, plus dozens more "urban" tasting rooms, most of them in downtown Napa. This could be shocking news, too!