Yeah, I've found that if I use the GPS satellite setup, it IS spot on for where I am. And for just that reason, why would you not use the satellite setting?
I'm talking about just using the mapping thing, not the latitude thing.
And, like others have attested to, in fairly short order I run off the map. My little blue indicator is moving along on the blue and white background. Actually, I think this happens more when using the satellite picture than the bare map.