I bet it saves tires more than fuel. Ha!
Actually, I've been debating if overcoming the throttle lag would actually help me save fuel because I currently push harder because I know I need to just to get going. Then, I get too far into the throttle and next thing I know, I am at 4k RPMs when I was only trying to add a little bit of speed quickly. This is especially true when trying to overcome the drops in speed when going up overpasses (not many hills in Florida) on the highway. I also have the 3.21 gears, so it's not as responsive.