I'll tell you what Mexicans excel at - it's jaywalking. They can be 10 feet from a cross walk, but the entire family will be standing in the middle of the road looking for a chance to cross.
I ALWAYS leave thinking I made a good deal. I don't go in thinking I'm going to be putting a hurting on the dealership or roll out on their actual invoice, butt I NEVER let them move me from the bottom line that I feel comfortable paying after extensive homework.