How accurate is the placement of satellite imagery on products like Google Earth?

Let’s say you have a vehicle with accurate dead reckoning (within two inches using inertial navigation let’s say—using GPS for drift correction only, no DGPS in this case although feel free to discuss it in your answer) and you were trying to navigate with great accuracy to a place you haven’t been with your vehicle and must navigate to using a waypoint selected from Google Earth. Statistically speaking, how much can the imagery be off from reality? Are we talking inches, feet or meters? Is there jitter?

Are there any papers or discussions with solid sources as to the accuracy of the placement of images that you can point me to?

Please only answer if you have a solid source or have firsthand knowledge.