My theory, based on the fact that I've done nothing to try to fix this issue, is that it comes and goes. That GS will use a lot of power at seemingly random times, and then stop using a lot of power. That likely results in people reporting a lot of fixes which really are not fixes.
BTW, I had no unusual battery drain yesterday, so I don't think this even happens to everyone at the same time. I even drove to four locations using Google Navigation with the screen on, without plugging in the phone, without issue.