"I know their album has done well to a point, not as well as previous ones have tho"
I'm sorry - perhaps you missed when I reported "Taking The Long Way has the highest-charting debut numbers of any album in the Dixie Chicks' career."
That means the album has done better than previous albums.
I will note that all reports that i can find on the 'net about slow ticket sales are from June - before the tour. I find no reports that claim after-the-fact- that any concert was unsuccessful. They are in fact, still on tour.
