"In response to those of you who think that just because a group has sold a ton of records and sells out concerts must mean that a group is making good music..."

No one said that Spartacus. Those of us who have cited the Dixie Chicks ability to sell records in spite of the tempest in the teapot caused by the right wing Republican controlled media, have made the point that the so-called boycott has been totally ineffective, if the intent of it was to destroy the careers of the Dixie Chicks (which I believe was the vicious intent of the boycott organizers and those who honor it).

You seem to be claiming for yourself the right to use your personal taste in musicians, to judge whether the Dixie Chicks have musical talent. That sort of fallacious argument gets you nowhere. Frank Zappa was no scientist, and some would claim he wasn't much of a musician, either.