Then you have fallen victim to the placebo effect and inadequate control of your tests. If your hack changes nothing outside of the file system and you reflash the file system and see no regression, then you didn't have an accurately measured improvement in the first place. You just thought you did. There are *lots* of variables here and measurable improvements are not easy to come by, but they are *always* logical. There is no ghost in your phone that was charmed by your hacks. :-)

--Brad