I don't see why that would help, I only see the GPS icon turn on when I accidentally press the search button and Bing pops up ( I have location access on for it). My battery has been all over the place, often good, sometimes terrible.
The 19th after an overnight charge and disconnect at 6am I was down to 10% at 3pm. With a total 75 min of random browsing, gaming, calls, texts, tweets ( I kept track of what I used).
I made one change: Disable gmail sync. My hotmail, outlook and Work Outlook accounts were left unchaged at 1hr sync intervals.
Today, after charging it fully last night (the 19th) I disconnected it at 11pm (of the 19th), woke up at 6am, battery still 100% (no drain during the 7hrs of standby), Right now it's sitting at 13% after 18hrs of being disconnected. I used it heavily (by my standards), this meaning 335 total minutes of calls, tweets, sms, browsing , picture taking, gaming (I played geoDefense swarm 75 minutes and it drained 20% battery).
I was originally thinking about returning it but today's performance has changed my mind. I do have dust inside the front camera so that might be a cause for exchange... Decision Decisions, only 3 days left to exchange to ATT.