bobby gets awarded 100 internets for the correct use of Dialect vs Accent.
Dialect: Differences in how native speakers speak a language in different regions (Boston dialect, California dialect)
Accent: Differences in how non-native speakers pronounce words differently than native speakers, based on their native language (German accent, Italian accent, Arnold Schwarzenegger accent)
Also I would argue that the Southwest is new enough that we speak pretty close to the textbook 'correct' Standard American English...no extra vowels where they shouldn't be or extra/dropped consonants on either end of our words...at least in Arizona and NM, anyways. I can't speak for Texas.
Edit: Wikipedia confirms that there is no listing for an 'Arizona' dialect, even in the southwestern region:
http://en.wikipedia.org/wiki/List_of...glish_language