I've lived in Tucson since 1975. Things are the same. There's no more brown people here than when I started, there's no more Mexicans in local offices than when I started. it's much-ado about nothing. Maybe CA is going to the dogs, but given the governors the place has had since Reagan that should come as no surprise and has little if anything to do with the immigrant population.
That's funny, because throughout my travels of the southwest, I always found Arizona to be the least invaded. California, New Mexico and Texas are by far seeing more of the effects than Arizona. However, even the Phoenix area is seeing a lot of the negative effects.
I live in the Atlanta area, and I can tell you that there are roughly 200,000 more Mexicans here than there were ten years ago. In 1990, the Mexican population was less than one percent. Today, it is roughly seven to eight percent of the metro. Most of these invaders have arrives since 1995, thus the issue is even more relevant to today.