Congratulations, you have managed to provide a two second delay between clicking on, for example, the Firefox icon and the resulting sprite CSS being displayed on a brand spanking new eight core, 8GiB RAM system. I hope you're proud of your abuse of my computer's resources. But, alas, I shall be having no more of this nonesense!
Christ, you act like you're doing someone a favor running this tool that was built to help you save time. Let me guess, you're the guy who bitches when the WiFi is down on the airplane.