Coolpix P510 GPS performance

How is the GPS performance?

Is there a mode like on the Panasonics, where the GPS stays on even when the camera is powered down, so it can tag a photo immediately after the camera is powered on?

I currently have the Sony HX100V and the main reason I want to get rid of it is the slow GPS tagging -- the camera shuts off the GPS when powered down and then it takes about a minute or more to get a lock. Which means that when traveling, many of my shots are not tagged since I turned it on, took the shot and turned it off before it ever locked.