on the differences between california and texas lingo

BWP: So when are y'all coming?

Beardsy: (incredulous) DID YOU JUST SAY Y'ALL?!?

BWP: Yeah, so? Don't people in California say y'all?

Beardsy: NO!

BWP: Well then what the hell do you say when you're referring to a group of people?

Beardsy: "Hey jerks"