Using a blinker is just like asking, "Excuse me, may I please come over?"
To which the car in the applicable lane says, "Why yes, come right over."
Unless, of course, the car in the applicable lane never learned to share or have good manners when it was just a Matchbox-sized toddler, in which case the car in the applicable lane speeds up and says, "No! My lane!"
On a separate but related note: Don't you think if you were driving a motorcycle, which is already more dangerous than driving a car, you would adhere to such common-sense traffic laws as red lights? All I can say is that I'm glad I didn't start going right when my light turned green, because I was already in the intersection when he zoomed in front of me.
Conclusion: I am not going to make any comments about region-specific driving (because I don't think that's very fair or very true), but I will say that I am more accustomed to the unspoken rules of driving in California. I am more able to anticipate the actions of other drivers and the potential dangers of the areas. Someday I will have driven more in Utah than in California, and the balance will probably tip the other way. But until then, I'd best be alert.