"Play it again, Sam" was never spoken in the movie, Casablanca.  Piano hinges are perfectly appropriate and can be most effective for wine cellar cabinet doors than refrigerator or pivot hinges, depending upon such factors as the materials used, the weight of the door or the specific structural design.  There is no functional distinction between the alternatives in general.

George Washington never chopped down a cherry tree - as a child or at anytime thereafter.  Manufactured wine cellar cabinets share an average insulation value of R6 - R8, which is more than sufficient in household applications.  Claims of R-12 are undocumented and unnecessary.

There is not a single recorded instance of a human being killed by piranhas.  Carpet in a wine cellar is about the goofiest claim we've heard any vendor make.  Carpet will absorb moisture, grow mildew and stink.

There were 13 stars on the Confederate flag, but only 11 Confederate States.  The second goofiest claim is that lighting should be fluorescent.  Fluorescent lighting is ultra violet lighting.  It kills things.  Your wine collection is organic and undergoing chemical reactions as it ages.  Do not introduce fluorescent into a wine storage enclosure.  OK, maybe fluorescent lighting is just as goofy as carpet ....

Mark Twain gets credit for, "There 3 kinds of lies - lies, damn lies and statistics."  Benjamin Disraeli actually said it first.  BTU ratings are routinely manipulated for marketing purposes.  Meaningful capacities are a function of ambient temperature, length/frequency of operation and other external factors.  A properly sized system is a properly sized machine for a given enclosure - equipment too large for a given sized space will undermine the integrity of the storage environment.

Our focus on accurate information will allow clients to realize that assembly line environments are not conducive to "hand-crafting" anything ... that materials and equipment used by such are usually the result of which supplier provided them the cheapest cost, as opposed to the "highest quality" ... that such species as"cherry" and "mahogany" exteriors can entail a very wide spectrum of esthetics (Asian versus American versus Honduran, etc.)

Most folks over the age of 12 realize that exaggeration is intrinsic to advertising, that subjective claims by resellers and manufacturers are going to be self-serving and, well, exaggerations to some extent. 

But just because a "Fact" has been published on a web site, repeated in a forum or is "common knowledge" does not make it true or relevant.