Not from Chihuahua, but I live in Baja California, and the last 2 decades saw a surge in popularity in Tex-mex style burritos, at least in my city, Mexicali. The US makes burritos really big with really crazy, heavily unhealthy fillings, stuff like boneless buffalo wings, rice and fries in the same burrito, smothered in creamy and hot sauces. For some it's delicious, for others it's disgusting. But they were definitely not this way originally. I would compare original burritos to tacos, in a rolled form. On the other hand, US style burritos are more akin to wraps, mainly because of size and ingredient variety inside and outside of the tortilla.