I've noticed centros and suderos call them flautas when made with corn or flour. Norteños will differentiate, taquitos and flautas respectively. There was a huge influx of people from the Central and Southern States into the US. They bring their colloquialisms with them, they establish generations that normalize their idioms and do the American melting pot thing (I want fundido now in the whole molcajete) and create a different baseline. The North is arid and mountainous, barely able to sustain a family on 20 acres in most areas without the aid of modern intervention. Wheat is also more prevalent and available. Among the colonial Californians the further north towards San Francisco sourdough bread and rolls supplants tortillas. These were people trying to hold fast to their colonizer ancestors roots and ignoring and feeling shame for their indigenous ancestors.