Their pitching has been bad, too. John Garland has been a little worse than you might have expected, and Jose Contreras has been truly awful. Mark Buehrle and Javier Vazquez have been about what you would expect. Their bullpen has been bad except for Bobby Jenks. Again most of these guys haven't been any worse than you would expect.
So yeah the White Sox are really bad, but they should be really bad. Their management put together a bad team. Who knows how much of that equation is Guillen. He's certainly shown a love for putting fast guys with no patience at the top of his batting order, and that is a major reason for their terrible offense.