Below is a statement from the Where is my Pre website.

How Do I Disable The Google Location Services?
You should turn off the Google location services. The reason for this is because they can interfere with the performance of the GPS device on the phone. Users have reported that with this turned on, location accuracy can suffer greatly.

To turn off the service, open the Launcher and choose Location Services. Drop down the preferences menu and click Locate Me Using.... Make sure GPS is checked and Use Google Service is unchecked, as seen in the screenshot.

My questions are, is this true and are there any down sides to this?