The burrito was invented in SF after all. South of the border, aside from tourist areas catering to Americans, Mexicans don't seem to know what burritos are.
Entonces usted no ha estado en muchas regiones de México.
Burritos duda se originó en México.
FYI, Burritos are Mexican, but in Mexico they are considered "northern" cuisine, along with anything else involving flour tortillas. Mexico's north is sparsely populated and generally looked down upon by people further south, so it is true that most Mexicans have never had a burrito.

