As with most ethnic foods I don't think you'll have the same thrill as in the country of origin
With that said the NY Times reported on DO
and then there is Entrevinos at Oscar Wilde 9 in Polanco
Hope you enjoy 'tapas' in Mexico.
re: Ruth in Condechi
fantastic! don't know how i missed that article, and thank you for the other recommendation. and you're right, about it not being the same as being in spain, but considering i live in df, and have not much time to travel to spain for the moment, a seemingly great tapas place in df will do just fine. thanks!