How much time of your day was connected to a Wifi network?
I would say I was connected to wifi for about 5 hours of the day. Majority of my usage was over 3G though.
Like I mentioned before though, I haven't noticed any difference in my battery life compared to what it was before I started using the app.
To be honest, I just think the always on GPS icon is googles way to bypass apples background application rules. It's defiantly not constantly using GPS though else I imagine my battery would be finished in a couple of hours.
My only concern now is that I can't easily/quickly see if any other app is currently using the GPS as the icon is now always present.