I would have to agree that 'maps' would need to know where you were to function in the way that Apple would want it to, e.g location services for those with smart phones etc. As to the rest, who knows what is sent out, and once sent out it's fair game for whomever it would seem. It would perhaps make sense for companies to momentarily 'save' a draught to their servers as a protection to the user against data loss for reasons various, very considerate…..the flip side is that it can be abused, rendering the expected privacy toothless. Who knows what happens, but I have to say that on the whole Apple seem to offer more protection than many in my small experience.
SHJ