Just thought I'd put my input into this topic.

I tested my phone for a 20min period, twice before the Smart Reflex change, and twice after if (leaving my phone idle for 30 mins or so before testing after bootup)

Pre-hack:
1) 11mAh after 20 mins
2) 14mAh after 20 mins

Post-hack:
1) 12 mAh after 20 mins
2) 14 mAh after 20 mins

So for me at least, it doesn't seem to make a difference on idle. Whether it will or not during use remains to be seen. Although I didn't do any timed tests, I noticed the phone was less responsive and a bit slower to react. However, this could be because I read about other people's reports, so I had expected this to happen (I forget the name of the effect).