I think it's a fair summary to say that we have two definitions of authenticity bumping heads (both with a fair amount to be said for them). 1. Authenticity in the sense of a style, an approach, a culinary zeitgeist (I refuse to say "a holistic approach" -- when I hear the "h-word" I reach for my shotgun). By this meaning, Babbo or Lupa are the closest of anything in New York to "authentic" Italian cooking. 2. Authenticity in the sense of a simulacrum, some sort of high-correspondence representation. (And no, I do not think the Epcot Center is exemplary of this definition -- I've lived in Norway and I can tell you the Norwegian portion of Epcot is nothing like Norway past or present). I haven't been to Thailand but maybe Sphriphithai (sp.?) is exemplary of this? I think it's fair to say that most of the time when talking about food most of us actually mean a combination of the above. Most here would probably laugh at a menu reference to "authentic cippino" or "authentic chop suey" or "authentic spaghetti and meatballs" without having to think about it. So, we often mean the second definition yet we wouldn't criticize Babbo in the same breath. However, we (or most of us at any rate) attach value to the second definition -- it's something that we look for at least some of the time and probably attach a value to it independent of taste. I'm meandering here but it gets more complex when we start discussing culinary traditions begun here by immigrants (that may now be several generations old) -- for example, I've been asked many times about where to find "authentic" Mexican -- without exception the questioner has always meant "Tex-Mex"; otherwise I'd have to send them at least to Chicago if not Oaxaca. I've had what was probably more authentic Thai in Milwaukee than anywhere in Manhattan (at least in terms of spiciness and robusticity of flavor). And to throw a different spin: probably the ultimate ironic commentary on differing notions of authenticity is the ubiquitousness of chopsticks in Thai restaurants....something inauthentic catering to the customer's false knowledge of "authenticity." my 3 cents.