If what you said is true about the virtuous overlock app, the battery drain is not from the app that just changes the files, but from the disabling of the overclock daemon with setcpu being installed. I haven't read about battery drain from the vu overclock but it's worth testing it out.
That's a good point - but who knows? I'm not saying I know with 100% certainty that that's what caused the battery drain. I'm just saying that's what the DEVS said, and that since they removed it my battery life has doubled. The difference in battery life could be attributable to something else, but going just by the information available to me, it seems to have been the OC app.