How about actually looking at the stats and conclusions and refuting what was found instead of saying "It's from Berkley, so it must be wrong!" This is a statistical analysis based on freely available public records. Numbers can be manipulated, true, but this is not an opinion piece, it's a mathematical interpretation of statistical data. Either their argument is statistically viable or it is not. If you believe it is not, then by all means, show why it is not.
You're argument is the equilavent of many here who slammed Fahrenheit 9/11 for being full of lies without even seeing the movie. They may be correct, but they're automatic knee-jerk reaction ensures that they will never really know one way or another. I'd expect more from a self-proclaimed free-thinker such as yourself.