I could tell the difference in SOME vodka's STRAIGHT when I bartended at Red Robin....when I started working at the nice italian restaurant I am at now, I had more access to nicer Vodka's (never even heard of Chopin before I worked there) and tasted a MILLION times more Martini's than I ever had in my life....After you drink ALOT of martini's (I drink the extra stuff after every martini I pour, if there is extra) you develop a palate for it....But I agree, most people are full of crap abouts some stuff...but alot of vodka's are distilled differently and some have flavor added to them (Goose being one of them)....