Nice list although it is yet far from the best tapas adviser: El Pais(This is another big newspaper like ABC).
There are some oversights difficult to understand:
La taverna de Antonio Sanchez, El Almendro,la casa del abuelo, Casa Alberto....

Best Regards to all the Madridmen reading this,
Andres Jarabo

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Taste Madrid with:
http://www.walksofspain.com