I don't know about that. One of my best buddies in college was a migrant worker who came here legally, worked his ass off in the fields, studied his ass off and made it to college (a little later than some) to get a higher degree to make more money. Anyways, he was as "mexican" as they come. He is not spanish.
Anyhooo, I took him out to dinner at some chain restuarant Azteca in tri cities WA (this after he took me to a local "real" mexican place in walla walla, we are talking hardcore, no sourcream etc...) and I'll be, he loved it! LOL. We laughed about it all the way home....