Then explain the size of the antenna in this: http://freedominput.com/site/index.php?option=com_content&task=view&id=111&Itemid=81 The whole device is 1.2" x 1.8". I don't see how accuracy can be effected by SIZE. If the raw data is there, it's there. This GPS is as accurate as the $500 TomTom I have.
I said that the antenna is too SMALL. Dedicated GPS devices are designed to maximize reception: big antenna, carefully placed, etc.
As Apple's engineer explained it to me, there's too much else going on inside the iPhone (Wi-Fi, multitouch screen, 10 radios, etc.) to do much more than slip in a sliver of a GPS circuit, so it will never have the accuracy necessary for turn-by-turn directions.
--Pogue