Well, I know this. With fastboot on, my phone booted in 18.65 seconds and I had full control of everything, including my widgets. With fastboot off, the phone took 48.12 seconds to boot to the point where I could unlock it, and the widgets didn't full load until the 1:13.45 mark. So it does make big a difference, makes sense that it would be due to the ram being cleared out on a "slow boot". I just wonder why the setting is in the "Power" section... does it save power to have it unchecked? I would assume so, since it would mean no power is being used to keep ram powered on.