<p>For a few days after the Dixie Chicks' lead singer, Natalie Maines, told a London audience, "Just so you know, we're ashamed the president of the United States is from Texas," there was not a ripple about the remark. The American ambassador to Britain, William Farish, was at the show and made it a point to greet the Texas trio at a reception afterward. Although six critics reviewed the March 10 concert, only one mentioned the comment in print.</p>