I'm glad you have better things to complain about, but it's fact not perception about water. Different places get their water from all over. Some of the best tap water I have ever had was in South Lake Tahoe, and some of the worst was reclaimed water in Los Angeles. Some people use fluoridated water, some use well water, I'm sure others use rain water. All water has different minerals in it. This is not perception, this is reality.
Americans like their pizza the same way Argentinians like their beef.